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hunterscreen229 · 4 years ago

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Jre 8 Dmg For Mac

Java Archive Downloads - Java SE 8u211 And Later

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8 Installation Of The JDK And The JRE On MacOS - Oracle

The Java Development Kit (JDK), officially named 'Java Platform Standard Edition' or 'Java SE', is needed for writing Java programs. The JDK is freely available from Sun Microsystems (now part of Oracle). The mother site for JDK (Java SE) is http://www.oracle.com/technetwork/java/javase/overview/index.html.

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'JDK' or 'JRE'?

Summary: JDK 8 should be installed in your system to run SysTools Mac software even if you have latest version of JDK available in your system. It is because, our application requires installation of JDK & JRE in the user machine for running the software properly. The latest version like JDK 11, 13 does not provides JRE installers.

JRE (Java Runtime) is needed for running Java programs. JDK (Java Development Kit), which includes JRE plus the development tools (such as compiler and debugger), is need for writing as well as running Java programs. In other words, JRE is a subset of JDK. Since you are supposed to write Java Programs, you should install JDK, which includes JRE.

JDK Versions

Reference: 'Java Version History' @ https://en.wikipedia.org/wiki/Java_version_history.

JDK Alpha and Beta (1995): Sun Microsystem announced Java in September 23, 1995.

JDK 1.0 (January 1996): Originally called Oak (named after the oak tree outside James Gosling's office). Renamed to Java 1 in JDK 1.0.2.

JDK 1.1 (February 1997): Introduced AWT event model, inner class, JavaBean, JDBC, and RMI.

J2SE 1.2 (JDK 1.2) (December 1998): Re-branded as 'Java 2' and renamed JDK to J2SE (Java 2 Standard Edition). Also released J2EE (Java 2 Enterprise Edition) and J2ME (Java 2 Micro Edition). Included JFC (Java Foundation Classes - Swing, Accessibility API, Java 2D, Pluggable Look & Feel, and Drag & Drop). Also introduced Collection Framework and JIT compiler.

J2SE 1.3 (JDK 1.3) (May 2000): Introduced Hotspot JVM.

J2SE 1.4 (JDK 1.4) (February 2002): Introduced assert statement, non-blocking IO (nio), logging API, image IO, Java webstart, regular expression (regex) support.

J2SE 5.0 (JDK 5) (September 2004): Officially called 5.0 instead of 1.5 (by dropping the 1.). Introduced generics, autoboxing/unboxing, annotation, enum, varargs, for-each loop, static import. See 'JDK 5 New Features'.

Java SE 6 (JDK 6) (December 2006): Renamed J2SE to Java SE (Java Platform Standard Edition). No new language features. See 'JDK 6 New Features'.

Java SE 7 (JDK 7) (July 2011): First version after Oracle purchased Sun Microsystem - aslo called OracleJDK. Introduced Strings in switch statement, Binary integer literals, allowing underscores in numeric literals, improved type inference for generic instance creation (or diamond operator <>), Catching multiple exception types and rethrowing exceptions with improved type checking. See 'JDK 7 New Features'.

Java SE 8 (JDK 8) (LTS) (March 2014): Included support for Lambda expressions, default and static methods in interfaces, improved collection, and JavaScript runtime. Also integrated JavaFX graphics subsystem. See 'JDK 8 New Features'.

Java SE 9 (JDK 9) (September 21, 2017): Introduced modularization of the JDK (module) under project Jigsaw, the Java Shell (jshell), and more. See 'JDK 9 New Features'.

Java SE 10 (18.3) (JDK 10) (March 2018): Introduced var for type inference local variable (similar to JavaScript). Introduced time-based release versioning with two releases each year, in March and September, denoted as YY.M. Removed native-header generation tool javah. See 'JDK 10 New Features'.

Java SE 11 (18.9) (LTS) (JDK 11) (September 2018): Extended var to lambda expression. Standardize HTTP client in java.net.http. Support TLS 1.3. Clean up the JDK and the installation package (removed JavaFX, JavaEE, CORBA modules, deprecated Nashorn JavaScript engine). OracleJDK is no longer free for commercial use, but OpenJDK is still free. See 'JDK 11 New Features'.

Java SE 12 (19.3) (JDK 12) (March 2019): Switch Expression (preview). See 'JDK 12 New Features'.

Java SE 13 (19.9) (JDK 13) (September 2019): Switch Expression (preview), Multi-line Text Block (preview). See 'JDK 13 New Features'.

Java SE 14 (20.3) (JDK 14) (March 2020): Records (preview)

How To Install JDK on Windows

Step 0: Un-Install Older Version(s) of JDK/JRE

I recommend that you install only the latest JDK. Although you can install multiple versions of JDK/JRE concurrently, it is messy.

If you have previously installed older version(s) of JDK/JRE, un-install ALL of them. Goto 'Control Panel' ⇒ (optional) 'Programs' ⇒ 'Programs and Features' ⇒ Un-install ALL programs begin with 'Java', such as 'Java SE Development Kit ..', 'Java SE Runtime ..', 'Java X Update ..', and etc.

Step 1: Download JDK

Goto Java SE download site @ http://www.oracle.com/technetwork/java/javase/downloads/index.html.

Under 'Java Platform, Standard Edition' ⇒ 'Java SE 13.0.(x)', where (x) denotes a fast running security-update number ⇒ Click the 'Oracle JDK Download' button.

Under 'Java SE Development Kit 13.0.(x)' ⇒ Check 'Accept License Agreement'.

Choose the JDK for your operating system, i.e., 'Windows'. Download the 'exe' installer (e.g., 'jdk-13.0.(x)_windows-x64_bin.exe' - about 159MB).

Step 2: Install JDK

Run the downloaded installer (e.g., 'jdk-13.0.(x)_windows-x64_bin.exe'), which installs both the JDK and JRE.

By default, JDK is installed in directory 'C:Program FilesJavajdk-13.0.(x)', where (x) denotes the update number. Accept the defaults and follow the screen instructions to install JDK.

Use your 'File Explorer', navigate to 'C:Program FilesJava' to inspect the sub-directories. Take note of your JDK installed directoryjdk-13.0.(x), in particular, the update number (x), which you will need in the next step.

I shall refer to the JDK installed directory as <JAVA_HOME>, hereafter, in this article.

Step 3: Include JDK's 'bin' Directory in the PATH

Windows' Command Prompt (CMD) searches the current directory and the directories listed in the PATHenvironment variable (or system variable) for executable programs. JDK's programs (such as Java compiler 'javac.exe' and Java runtime 'java.exe') reside in the sub-directory 'bin' of the JDK installed directory. You need to include JDK's 'bin' in the PATH to run the JDK programs.

To edit the PATH environment variable in Windows 10:

Launch 'Control Panel' ⇒ (Optional) 'System and Security' ⇒ 'System' ⇒ Click 'Advanced system settings' on the left pane.

Switch to 'Advanced' tab ⇒ Click 'Environment Variables' button.

Under 'System Variables' (the bottom pane), scroll down to select variable 'Path' ⇒ Click 'Edit..'.

For Newer Windows 10: You shall see a TABLE listing all the existing PATH entries (if not, goto next step). Click 'New' ⇒ Click 'Browse' and navigate to your JDK's 'bin' directory, i.e., 'c:Program FilesJavajdk-13.0.(x)bin', where (x) is your installation update number ⇒ Select 'Move Up' to move this entry all the way to the TOP.

For Older Windows 10 (Time to change your computer!): (CAUTION: Read this paragraph 3 times before doing this step! Don't push 'Apply' or 'OK' until you are 101% sure. There is no UNDO!!!) (To be SAFE, copy the content of the 'Variable value' to Notepad before changing it!!!) In 'Variable value' field, APPEND 'c:Program FilesJavajdk-13.0.(x)bin' (where (x) is your installation update number) IN FRONT of all the existing directories, followed by a semi-colon (;) to separate the JDK's bin directory from the rest of the existing directories. DO NOT DELETE any existing entries; otherwise, some existing applications may not run.

Note: If you have started CMD, you need to re-start for the new environment settings to take effect.

Step 4: Verify the JDK Installation

Launch a CMD via one of the following means:

Click 'Search' button ⇒ Type 'cmd' ⇒ Choose 'Command Prompt', or

Right-click 'Start' button ⇒ run.. ⇒ enter 'cmd', or

Click 'Start' button ⇒ Windows System ⇒ Command Prompt

Issue the following commands to verify your JDK installation:

Issue 'path' command to list the contents of the PATH environment variable. Check to make sure that your JDK's 'bin' is listed in the PATH.

Issue the following commands to verify that JDK/JRE are properly installed and display their version:

Step 5: Write a Hello-World Java Program

Create a directory to keep your works, e.g., 'd:myProject' or 'c:myProject'. Do NOT save your works in 'Desktop' or 'Documents' as they are hard to locate. The directory name shall not contain blank or special characters. Use meaningful but short name as it is easier to type.

Launch a programming text editor (such as TextPad, NotePad++, Sublime Text, Atom). Begin with a new file and enter the following source code. Save the file as 'Hello.java', under your work directory (e.g., d:myProject).

Step 6: Compile and Run the Hello-World Java Program

To compile the source code 'Hello.java':

Start a CMD Shell (Search ⇒ enter 'cmd' ⇒ select 'Command Prompt').

Set the Current Drive to the drive where you saved your source file 'Hello.java'. If you use drive 'c', skip this step. Else if you use drive 'd', enter 'd:' as follow:

Set the Current Working Directory to the directory that you saved your source file via the cd (Change Directory) command. For example, suppose that your source file is saved in directory 'myProject'.

Issue a dir (List Directory) command to confirm that your source file is present in the current directory.

Invoke the JDK compiler 'javac' to compile the source code 'Hello.java'. The compilation is successful if the command prompt returns. Otherwise, error messages would be shown. Correct the errors in your source file and re-compile. Check 'Common JDK Installation Errors', if you encounter problem compiling your program.

The output of the compilation is a Java class called 'Hello.class'. Issue a dir (List Directory) command again to check for the output.

To run the program, invoke the Java Runtime 'java':

Everything that can possibly go wrong will go wrong: Read 'JDK Installation Common Errors'.

Step 7: (For Advanced Users Only) JDK's Source Code

Source code for JDK is provided and kept in '<JAVA_HOME>libsrc.zip' (or '<JAVA_HOME>src.zip' prior to JDK 9). I strongly recommend that you to go through some of the source files such as 'String.java', 'Math.java', and 'Integer.java', under 'javalang', to learn how experts program.

How to Install JDK on macOS

Step 1: Check if JDK has been Pre-Installed

To check if JDK has been installed, open a 'Terminal' (Search 'Terminal'; or Finder ⇒ Go ⇒ Utilities ⇒ Terminal) and issue this command:

If a JDK version number is returned (e.g., JDK x.x.x), then JDK has already been installed. If the JDK version is prior to 1.8, proceed to Step 2 to install the latest JDK; otherwise, proceed to 'Step 3: Write a Hello-world Java program'.

If message 'command not found' appears, JDK is NOT installed. Proceed to the 'Step 2: Install JDK'.

If message 'To open javac, you need a Java runtime' appears, select 'Install' and follow the instructions to install JDK. Then, proceed to 'Step 3: Write a Hello-world Java program'.

Step 2: Download JDK

Goto Java SE download site @ http://www.oracle.com/technetwork/java/javase/downloads/index.html.

Under 'Java Platform, Standard Edition' ⇒ 'Java SE 13.0.(x)', where (x) denotes a fast running security-update number ⇒ Click the 'Oracle JDK' 'Download' button.

Under 'Java SE Development Kit 13.0.(x)' ⇒ Check 'Accept License Agreement'.

Choose the JDK for your operating platform, i.e., macOS. Download the DMG installer (e.g, jdk-13.0.(x)_osx-x64_bin.dmg - about 172MB).

Step 3: Install JDK/JRE

Double-click the downloaded Disk Image (DMG) file. Follow the screen instructions to install JDK/JRE.

Eject the DMG file.

To verify your installation, open a 'Terminal' and issue these commands.

Step 3: Write a Hello-World Java Program

Create a directory called 'myProject' under your home directory (Launch 'Finder' ⇒ 'Go' ⇒ 'Home'; Select 'File' ⇒ 'New Folder' ⇒ 'myProject'). In macOS, the home directory of the current user can be referenced as '~'. Hence, this new directory can be referenced as '~/myProject'.

Use a programming text editor (such as Sublime Text or Atom) to input the following source code and save as 'Hello.java' under the directory '~/myProject'. (If you use macOS's default text editor 'TextEdit' (NOT recommended), you need to open a new file ⇒ choose 'Format' ⇒ 'Make Plain Text' ⇒ Enter the source code ⇒ Save as 'Hello.java'.)

Step 4: Compile and Run the Hello-World Java Program

To compile the source code 'Hello.java', open a new 'Terminal' ('Go' ⇒ 'Utilities' ⇒ 'Terminal') and issue these commands (as illustrated):

To run the Hello-world, invoke the Java Runtime 'java' as follows:

How to Install JDK on Ubuntu

There are several JDK implementations available for Linux, such as Oracle JDK, OpenJDK, Sun JDK, IBM JDK and GNU Java Compiler. We shall choose the Oracle JDK 8. Ubuntu chooses OpenJDK as its default JDK, which is not 100% compatible with Oracle JDK.

Step 0: Check if JDK has already been Installed

Open a Terminal and issue this command:

If a JDK version number (e.g., 'javac x.x.x') appears, JDK has already been installed. You can skip the installation and goto step 2.

To remove OpenJDK, issue command:

Step 1: Download and Install JDK

Goto JDK (Java SE) download site @ http://www.oracle.com/technetwork/java/javase/downloads/index.html. Under 'Java Platform, Standard Edition' ⇒ 'Java SE 11.0.(x)' ⇒ Click JDK's 'Download' ⇒ Under 'Java SE Development Kit 11.0.(x)' ⇒ Check 'Accept License Agreement' ⇒ Select 'Linux', 'tar.gz' package, (e.g., 'jdk-13.0.(x)-linux-x64_bin.tar.gz' - 171MB). The tarball will be downloaded in directory '~/Downloads', by default.

We shall install JDK under '/usr/local/java' (or Ubuntu's default JDK directory /usr/lib/jvm; or /opt/java). First, create a directory 'java' under '/usr/local'. Open a Terminal and issue these commands: Extract the downloaded package (Check your downloaded filename!) JDK shall be extracted in a folder '/usr/local/java/jdk-13.0.(x)', where (x) is the update number.

Inform the Ubuntu to use this JDK/JRE: The above steps set up symlinks java, javac, javaws at /usr/bin (which is in the PATH), that link to /etc/alternatives and then to JDK bin directory. The 'alternatives' system aims to resolve the situation where several programs fulfilling the same function (e.g., different version of JDKs). It sets up symlinks thru /etc/alternatives to refer to the actual programs to be used. Alternatively, you can include the JDK's bin and JRE's bin into the PATH directly.

To verify the JDK installation, issue these commands:

(Don't Do this step - It is taken care by 'alternative' in Step 3. Keep here to show you how to set PATH.) Add JDK's binary directory ('bin') to the 'PATH' by editing '/etc/profile': Add these lines at the end of the file '/etc/profile', replace '(x)' with the actual number: Rerun the configuration file by:

Step 2: Compile and Run a Hello-world Java Program

File Explorer ⇒ Home ⇒ Create a new folder called 'myProject' to keep our works.

Open 'Text Editor' (gedit). Enter the following source code and save as 'Hello.java' under the '~/myProject' directory created earlier.

To compile the Hello-world Java program, launch a Terminal and issue these commands:

Run the Hello-world Java program:

Source-Code Editors & IDEs for Java Programming

Eclipse IDE

You need to first install Eclipse. Read 'How to Install Eclipse'.

You can then proceed to write your first Java program. Read 'Writing your first Java Program with Eclipse'.

Eclipse allow you to debug program graphically. Read 'Debugging program in Eclipse'.

NetBeans IDE

You need to first install NetBeans. Read 'How to Install NetBeans'.

You can then proceed to write your first Java program. Read 'Writing your first Java program with NetBeans'.

NetBeans allow you to debug program graphically. Read 'Debugging program in NetBeans'.

Visual Studio (VS) Code IDE

Click HERE, look for 'VS Code for Java Programming'

Sublime Text (for Windows, macOS, Linux)

Click HERE, look for 'Sublime Text for Java Programming'

Atom (for Windows, macOS, Linux)

(TODO)

TextPad (for Windows only)

Click HERE, look for 'TextPad for Java Programming'.

NotePad++ (for Windows only)

Click HERE, look for 'NotePad++ for Java Programming'.

(JDK 11) Launch Single-Source-File New Feature

From JDK 11, you can compile/run a single-file program in one step, without explicit compilation.

Write a 'Hello.java' (see previous section).

Delete 'Hello.class', if it exists.

You can compile/run 'Hello.java' in one command as follows:

Notes:

This is applicable to single source-file only.

No need to use javac to compile the program.

It compiles in memory (without producing a .class file), and run.

This feature is introduced for beginners to learn Java, and for professionals to test a Java feature.

The filename and classname need not be the same.

How To Set JAVA_HOME Environment Variable

Many Java applications (such as Tomcat) require the environment variable JAVA_HOME to be set to the JDK installed directory.

See 'How to set JAVA_HOME for Windows' or 'How to set JAVA_HOME for macOS/Linux'.

Common Errors in installing JDK

(Advanced) External JAR Files and Native Libraries

Notes: This section is applicable to JDK prior to JDK 9. JDK 9 introduces a new level called 'module' on top of package, and 'jmod' files for Java modules. Need to revise this section for JDK 9.

Java Archive Downloads - Java SE 8u211 And Later

External Java packages (such as Servlet, MySQL Connector/J, JOGL, JUnit) are often distributed in JAR files (Java Archive - a single-file package of many Java classes), with possibly Native Libraries ('.lib' and '.dll' in Windows, or '.a' and '.so' in Linux/macOS).

External JAR Files ('.jar')

If external JAR files are not properly included: https://hunterscreen229.tumblr.com/post/654151946943578112/adguard-mac-torrent.

During the compilation, you will receive compilation error 'cannot find symbol' on classes belonging to the external packages.

During execution, you will get a runtime error 'Could not find or load main class xxx' or 'NoClassDefFoundError'.

To include external JAR files, you can either:

Copy all the JAR files of the external packages to the Java's Extension Directories (NOT applicable to JDK 9).

For Windows, the JDK extension directory is located at '<JAVA_HOME>jrelibext' (e.g., 'c:Program FilesJavajdk1.8.0_xxjrelibext').

For macOS, the JDK extension directories are '/Library/Java/Extensions' and '/System/Library/Java/Extensions'.

For Ubuntu, the JDK extension directories are '<JAVA_HOME>/jre/lib/ext' (e.g., '/usr/user/java/jdk1.8.0_xx/jre/lib/ext') and '/usr/java/packages/lib/ext'.

The location of JDK's extension directories is kept in Java's System Property 'java.ext.dirs'. You can print its contents via System.out.println(System.getProperty('java.ext.dirs')).

You can also include all the JAR files in the CLASSPATH environment variable. CLASSPATH may contain directories (of Java classes) or JAR files (single-file archive of Java classes). If you set the CLASSPATH, you must also include the current directory (denoted as '.').

For Windows, set the CLASSPATH in Control Panel ⇒ System ⇒ Advanced system settings ⇒ Advanced ⇒ Environment Variables ⇒ System Variables ⇒ New ⇒ In 'Variable name', enter 'CLASSPATH' ⇒ In 'Variable value', enter '.;path1xxx.jar;path2yyy.jar', where the entries are separated by a semi-colon (;).

For Linux and macOS: Edit ~/.profile or ~/.bash_profile (or /etc/profile for system-wide setting) to include the following line at the end of the file: The entries are separated by colon (:).

You can also set the CLASSPATH in the javac/java command-line via the option -cp <paths> (or -classpath <paths>), for example,

External Native Libraries ('.lib', '.dll', '.a', '.so')

Some external package may provide static or shared native libraries in the form of '.lib' (Windows' static LIBrary), '.dll' (Windows' Dynamically Link Library), '.a' (Unix's static (Archive) library), or '.so' (Unix's Shared Object library).

Native Libraries are to be kept in a directory accessible via JRE's Property 'java.library.path', which normally but not necessarily includes all the directories in the PATH environment variable.

Native libraries are not involved in the compilation. But if they are not properly included during runtime time, you will get a runtime error 'java.lang.UnsatisfiedLinkError: no xxx in java.library.path'.

To include external native libraries:

Copy the native libraries into a system library directory, e.g., c:windowssystem32 (Windows), /usr/lib or /usr/local/lib (macOS / Unix). You can verify that the directory is included in Java's System Property 'java.library.path', via System.out.println(System.getProperty('java.library.path')).

You can also set the native library path via the java's command-line option -Djava.library.path=xxx, for example,

Eclipse/NetBeans

Using an IDE can greatly simplifies inclusion of external packages. Read 'Eclipse How-To' or 'NetBeans How-To'.

Link to References & Resources Java Platform, Standard Edition Installation Guide Contents Previous Next

REW Beta Release V5.20 Beta 29

This page describes how to install and uninstall JRE 8 on OS X computers.

This page has these topics:

See 'JDK 8 and JRE 8 Installation Start Here' for general information about installing JDK 8 and JRE 8.

See 'OS X Platform Install FAQ' for general information about installing JRE 8 on OS X.

System Requirements

Observe these requirements:

Any Intel-based computer running OS X 10.8 (Mountain Lion) or later.

Administrator privileges.

Note that installing the JRE on OS X is performed on a system-wide basis, for all users, and administrator privileges are required. You cannot install Java for a single user.

Only one JRE can be installed at a time. The system will not install a JRE that has a lower version than the current version. If you wish to install a lower version of the JRE, uninstall the current version as described in 'Uninstalling the JRE'.

Installing a JRE from Oracle will not update java -version symlinks or add java to your path. To be able to do this, you need to install the JDK.

JRE Installation Instructions

The JRE installation includes the JavaFX Runtime which is incorporated into the same directory structure.

8 Installation Of The JDK And The JRE On MacOS - Oracle

Depending on your processor, the downloaded file has one of the following names:

jre-8uversion-macosx-amd64.dmg

jre-8uversion-macosx-x64.dmg

Where version is 6 or later.

Download the file.

Before the file can be downloaded, you must accept the license agreement.

From either the Downloads window of the browser, or from the file browser, double click the file.dmg to launch it.

A Finder window appears containing an icon of an open box and the name of the .pkg file.

Double click the package icon to launch the Install app.

The Install app displays the Introduction window.

Note:

In some cases, a Destination Select window appears. This is a bug, as there is only one option available. If you see this window, select Install for all users of this computer to enable the Continue button.

Click Continue.

The Installation Type window appears.

Click Install.

A window appears that says 'Installer is trying to install new software. Type your password to allow this.'

Enter the Administrator login and password and click Install Software.

The software is installed and a confirmation window appears.

After the software is installed, delete the .dmg file if you want to save disk space.

Determining the Installed Version of the JRE

If you have not yet installed Apple's Java OS X 2012-006 update, then you are still using a version of Apple Java 6 that includes the plug-in and the Java Preferences app. See 'Note for Users of OS X that Include Apple Java 6 Plug-in'.

Only one JRE can be installed. Installing a JRE removes the previously installed JRE. The JRE version used by the system can be determined in one of two ways:

From System Preferences click the Java icon from the Other category. This launches the Java Control Panel. Click About.

Type the following in a Terminal window (note escaped space character, ignore line break):

The system will not install a JRE that has a lower version than the current version. If you want to install a lower version, first uninstall the existing version.

Uninstalling the JRE

To uninstall the JRE, you must have Administrator privileges and execute the remove commands either as root or by using the sudo(8) tool.

Remove one directory and one file (a symlink), as follows:

Navigate to /Library/Internet Plug-Ins and remove the JavaAppletPlugin.plugin directory.

Navigate to /Library/PreferencePanes and remove JavaControlPanel.prefpane.

Do not attempt to uninstall Java by removing the Java tools from /usr/bin. This directory is part of the system software and any changes will be reset by Apple the next time you perform an update of the OS.

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Submit or Build Your Profile > > Software Engineer Software EngineerNew 2 Openings Salary INR3Lac 3Lac – 4Lac CTCCTC Experience 4 yrsto5 yrs experience| Resume Required Location Palarivattom, Kochi Software EngineerFULL_TIME Borders Outsourcing Private Limited Not Specified Not Specified 4 yrs 2021-04-12T12:02:49 2021-06-11T12:24:27.162933+05:30 Not Specified Software Developer Job Benefits INR INR3Lac 3Lac – 4Lac CTCCTC Palarivattom, KochiErnakulam KeralaNot SpecifiedIN 9:30 AM – 6:30 PM(day shift) p We are looking for a passionate Software Engineer to design, develop and install software solutions. 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Ability to develop software in Knowledge of multiple back-end languages (e.g. C#, Java, Python, .Net,PHP, Laravle ) and JavaScript frameworks (e.g. Angular, React, Node.js) Databases (e.g. MySQL, MongoDB), web servers (e.g. Apache) and UI/UX design. AWS & Google Cloud (GCP) ( MUST ) /li li Experience in developing web applications using at least one popular web framework (JSF, Wicket, GWT, Spring MVC) /li li Experience with test-driven development /li li Mastery in software engineering tools /li li Ability to document requirements and specifications /li li Familiarity with software development methodology and release processes /li li BS degree in Computer Science or Engineering /li li Common IT Hardware, Software, Platform and Systems Knowledge: C, C++, Java, .NET, Python, BEA WebLogic, WebSphere, J2EE, JBoss, ADO, Perl, HTML, JSP, JavaScript, Web services, SOAP, XML, ASP, JSP, PHP, MySQL, SQL Server, Oracle, UNIX, Linux, Redhat Linux, STL, XSLT, OWL, AJAX, J2EE, J2ME, J2SE, Sun Solaris /li li Software Engineer top skills & proficiencies: /li li Software Development /li li Analytical & Problem Solving Skills /li li Ability to Learn Quickly /li li Team Player /li li Agile Development Processes and Principles /li li Written and Verbal Communication /li li Customer-Oriented /li li Analysis /li li General Programming Skills /li li Software Debugging /li li Software Documentation /li li Software Testing /li li Software Development Fundamentals & process /li /ul p br /p p strong Desired Candidate Profile /strong /p p br /p ul li High school degree or equivalent /li li Excellent analytical and time-management skills /li li Ability to work independently or as an active member of a team /li /ul Share via Additional Details Job Type Full Time Shift Timings 9:30 AM – 6:30 PM(day shift) Working Days 5 days Job Requirements Education Below 10th allowed Experience 4 yrs to 5 yrs of experience as Software Developer preferred Age 18 – 30 yrs Skills Compulsory Job Description We are looking for a passionate Software Engineer to design, develop and install software solutions. Software Engineer responsibilities include gathering user requirements, defining system functionality, and writing code in various languages, like Java, Ruby on Rails or .NET programming languages (C, C++, Java, .NET, Python, React, React Native, BEA WebLogic, WebSphere, J2EE, JBoss, ADO, Perl, HTML, JSP, JavaScript, Web services, AWS, GCP, SOAP, XML, ASP, JSP, PHP, MySQL, SQL Server, Oracle, UNIX, Linux, Redhat Linux, STL, XSLT, OWL, AJAX, J2EE, J2ME, J2SE, Sun Solaris) Our ideal candidates are familiar with the software development life cycle (SDLC) from preliminary system analysis to tests and deployment. Ultimately, the role of the Software Engineer is to build high-quality, innovative, and fully performing software that complies with coding standards and technical design. Roles and Responsibilities Proven work experience in software engineering Hands-on experience in designing interactive applications. Ability to develop software in Knowledge of multiple back-end languages (e.g. C#, Java, Python, .Net,PHP, Laravle ) and JavaScript frameworks (e.g. Angular, React, Node.js) Databases (e.g. MySQL, MongoDB), web servers (e.g. Apache) and UI/UX design. AWS & Google Cloud (GCP) ( MUST ) Experience in developing web applications using at least one popular web framework (JSF, Wicket, GWT, Spring MVC) Experience with test-driven development Mastery in software engineering tools Ability to document requirements and specifications Familiarity with software development methodology and release processes BS degree in Computer Science or Engineering Common IT Hardware, Software, Platform and Systems Knowledge: C, C++, Java, .NET, Python, BEA WebLogic, WebSphere, J2EE, JBoss, ADO, Perl, HTML, JSP, JavaScript, Web services, SOAP, XML, ASP, JSP, PHP, MySQL, SQL Server, Oracle, UNIX, Linux, Redhat Linux, STL, XSLT, OWL, AJAX, J2EE, J2ME, J2SE, Sun Solaris Software Engineer top skills & proficiencies: Software Development Analytical & Problem Solving Skills Ability to Learn Quickly Team Player Agile Development Processes and Principles Written and Verbal Communication Customer-Oriented Analysis General Programming Skills Software Debugging Software Documentation Software Testing Software Development Fundamentals & process Desired Candidate Profile High school degree or equivalent Excellent analytical and time-management skills Ability to work independently or as an active member of a team Company Details Borders has pioneered IT services in India for 15 years, consistently delivering business value with the latest technology. Software Engineer at Borders Outsourcing Private Limited(Posted by borders outsourcing private limited) 3Lac – 4Lac CTC Palarivattom, Kochi 4 yrsto5 yrs experience Note: Waahjobs does NOT ask money from jobseeker anytime. If a company is asking money from jobseeker, it is most probably a scam. Expected salary: Rs.25000 per month Location: Kochi, Kerala Job date: Tue, 13 Apr 2021 22:51:17 GMT Apply for the job now!

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zero-no-cool-blog · 7 years ago

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1.IntelliJ IDEA (разработчик JetBrains, Январь 2001 года)

Основные функции:

Поддержка более 20 языков программирования, так же 11 дополнительных языков через плагины сторонних разработчиков Направленна на максимальное удобство разработки, имеет умное автодополнение, включает поддержку всех последних технологий в области разработки ПО и все новейшие фреймворки.

2. NetBeans IDE (разработчик NetBeans Community и NetBeans Org , 1997 год)

Основные функции:

NetBeans IDE поддерживают рефакторинг, профилирование, выделение синтаксических конструкций цветом, автодополнение набираемых конструкций на лету и множество предопределённых шаблонов кода. Среда разработки NetBeans по умолчанию поддерживает разработку для платформ J2SE и J2EE. Начиная с версии 6.0 NetBeans поддерживает разработку для мобильных платформ J2ME, C++ (только g++) и PHP без установки дополнительных компонентов.

3. Eclipse (разработчик Eclipse Foundation, 2003 год)

Основные функции:

Разработка модульных кроссплатформенных приложений Eclipse служит в первую очередь платформой для разработки расширений, чем он и завоевал популярность: любой разработчик может расширить Eclipse своими модулями. Eclipse написана на Java, потому является платформо-независимым продуктом, за исключением библиотеки SWT, которая разрабатывается для всех распространённых платформ.

4.Qt Creator (разработчик Qt Development Frameworks, Март 2009 года)

Основные функции:

Кроссплатформенная свободная IDE созданная для разработки на С, С++ и QML. Разработана Trolltech (Digia) для работы с фреймворком Qt. Основная отличительная особенность Qt Creator — упростить разработку приложения с помощью фреймворка Qt на разных платформах. Так же есть такие особенности как отладка приложений на QML и отображение в отладчике данных из контейнеров Qt, встроенный дизайнер интерфейсов как на QML, так и на QtWidgets.

5.Geany (разработчик Geany Community октябрь, 2005 года)

Основные функции:

Geany представляет собой среду разработки для программистов и вебмастеров, позволяя удобно работать с программным кодом. Текстовый редактор Geany обладает большой производительность, быстро открывая большие текстовые файлы.

6. Embarcadero RAD Studio (разработчик Embarcadero Technologies, август 2002 года)

Основные функции:

Основной функцией можно назвать RAD-программирование, для Microsoft Windows Спецификаця данной IDE предполагает максимально быструю и качественную разработку Windows приложений, полагая в своей основе концепцию RAD – программирования.

7. Code::Blocks (разработчик The Code::Blocks team, Июль 2005 года)

Основные функции:

Это кроссплатформенная RAD-IDE, основная функция – создание приложений с использованием C++ и wxWidgets. Поддержка плагинов, наличие встроенного редактора пользовательского интерфейса (плагин wxSmith), возможность запуска IDE под любой ОС.

8.Xcode (разработчик Apple Inc. , 2001 год)

Основные функции:

Разработка программного обеспечения под macOS и iOS Xcode включает в себя большую часть документации разработчика от Apple и Interface Builder — приложение, использующееся для создания графических интерфейсов. Поддерживает языки C, C++, Objective-C, Objective-C++, Swift, Java, AppleScript, Python и Ruby с различными моделями программирования, включая (но не ограничиваясь) Cocoa, Carbon и Java. Сторонними разработчиками реализована поддержка GNU Pascal, Free Pascal, Ada, C#, Perl, Haskell и D

9. Microsoft Visual Studio (разработчик Microsoft, Апрель 1995)

Основные функции:

Позволяет разрабатывать как консольные приложения, так и приложения с графическим интерфейсом, в том числе с поддержкой технологии Windows Forms, а также веб-сайты, веб-приложения, веб-службы как в родном, так и в управляемом кодах для всех платформ, поддерживаемых Windows, Windows Mobile, Windows CE, .NET Framework, Xbox, Windows Phone .NET Compact Framework и Silverlight. Visual Studio включает в себя редактор исходного кода с поддержкой технологии IntelliSense и возможностью простейшего рефакторинга кода. Встроенный отладчик может работать как отладчик уровня исходного кода, так и отладчик машинного уровня. Остальные встраиваемые инструменты включают в себя редактор форм для упрощения создания графического интерфейса приложения, веб-редактор, дизайнер классов и дизайнер схемы базы данных. Visual Studio позволяет создавать и подключать сторонние дополнения (плагины) для расширения функциональности практически на каждом уровне, включая добавление поддержки систем контроля версий исходного кода (как, например, Subversion и Visual SourceSafe), добавление новых наборов инструментов (например, для редактирования и визуального проектирования кода на предметно-ориентированных языках программирования) или инструментов для прочих аспектов процесса разработки программного обеспечения

#programming #ide #technology #russian

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bmdsolutions · 4 years ago

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Java Là Gì? “Bí Quyết” Để Học Ngôn Ngữ Lập Trình Này Hiệu Quả

Tính đến ngày 21 tháng 01 năm 2021, Java là ngôn ngữ lập trình phổ biến thứ nhì thế giới với tỉ lệ 11,96% chỉ xếp sau ngôn ngữ C. Và kể từ khi ra đời cho đến nay, ngôn ngữ này vẫn luôn chiếm đầu bảng về xếp hạng cũng như tính năng trong tất cả các loại ngôn ngữ lập trình. Vậy Java là gì và điều gì đã khiến ngôn ngữ này nắm giữ “ngôi vị” cao nhất trong nhiều năm như thế?

Java là gì?

Java là một ngôn ngữ lập trình được sử dụng phổ biến nhất hiện nay. Ngôn ngữ lập trình Java được khởi xướng bởi James Gosling, Mike Sheridan, Patrick Naughton vào năm 1991 và chính thức phát hành vào năm 1995.

Ban đầu ngôn ngữ này được gọi là Oak (có nghĩa là cây sồi) nhưng sau đó James Gosling đã lấy tên Java – tên của một đảo của Indonesia và nổi tiếng về Coffee Peet để đặt cho ngôn ngữ này và sử dụng cho đến bây giờ.

Vậy cụ thể Java là gì? Để trả lời được câu hỏi này, bạn cần nắm được 5 nguyên tắc cốt lõi của nó:

Là ngôn ngữ lập trình đơn giản, hướng đối tượng và quen thuộc với người dùng.

Khả năng hoạt động mạnh mẽ và an toàn.

Có kiến trúc trung lập và di động.

Có thể thực thi với hiệu suất cao.

Có khả năng thông dịch, phân luồng và động.

Như vậy, ngôn ngữ này đã mở ra một bước tiến lớn trong lĩnh vực công nghệ thông tin khi nó cho phép các nhà phát triển ứng dụng viết một lần, chạy ở mọi nơi. So với ngôn ngữ C+ và C++ thì cú pháp của ngôn ngữ lập trình Java có ít cơ sở cấp thấp hơn. Tính đến tháng 9 năm 2020, các nhà phát triển ngôn ngữ Java đã cho ra mắt phiên bản Java 15 với nhiều cải tiến và vẫn đang liên tục cập nhật nhằm nâng cấp và cải thiện ngôn ngữ này.

Ngôn ngữ lập trình Java dùng để làm gì?

Java là ngôn ngữ có tính ứng dụng cao, đặc biệt đây là một ngôn ngữ thực sự chặt chẽ và mạnh mẽ nên khi học lập trình Java, bạn sẽ thu lại được nhiều giá trị hơn bạn tưởng. Bên cạnh việc tạo ra rất nhiều cơ hội về việc làm và thu cao cho lập trình viên thì ngôn ngữ này có thể dùng để:

Viết ứng dụng web (J2EE): Java luôn là lựa chọn hàng đầu cho các ứng dụng web yêu cầu hiệu năng cao. Ngôn ngữ này được sử dụng nhiều cho website thương mại điện tử, website bán hàng hoặc ứng dụng web.

Viết ứng dụng mobile (J2ME): Phát triển trò chơi và ứng dụng cho di động là cách tốt nhất để tận dụng thế mạnh của Java. Đặc biệt khi Android lên ngôi thì Java đã trở thành ngôn ngữ chính để phát triển ứng dụng cho hệ điều hành này.

Viết ứng dụng desktop (J2SE): JMeter hoặc Designervista là hai ứng dụng desktop được viết bởi Java. Tính linh hoạt và khả năng thông dịch của ngôn ngữ lập trình Java giúp bạn chỉ cần viết một lần và chạy trên Windows, Linux hay Mac một cách dễ dàng.

Ngoài ra, Java còn được sử dụng khá nhiều trong không gian nhúng, làm điện toán đám mây và giao dịch chứng khoán,… Vậy bạn đã thấy đây là một ngôn ngữ lập trình đáng học chưa nào?

Đặc điểm của ngôn ngữ Java là gì?

Cũng như các loại ngôn ngữ hướng đối tượng khác, ngôn ngữ lập trình Java sở hữu một số đặc điểm nổi bật như đơn giản, dễ học, hiệu suất cao, khả năng bảo mật tốt, đa luồng và có thể sử dụng cho nhiều đối tượng/ mục đích khác nhau. Ngoài ra thì nếu học lập trình Java, bạn có thể ngay lập tức nhận ra nhiều đặc điểm ưu việt của ngôn ngữ này như:

Tính trừu tượng (Abstraction): Ngôn ngữ lập trình Java có thể xác định các hành động liên quan đến một thực thể đặc thù, xét trong mối tương quan với ứng dụng đang phát triển một cách nhanh chóng và chính xác.

Tính đa hình (Polymorphism): Bản chất tính đa hình chính là phương thức này bao gồm cùng một số lượng các tham số dưới nhiều hình dạng khác nhau tùy theo từng hoàn cảnh.

Tính kế thừa (Inheritance): Các đối tượng trong Java có thể chia sẻ hoặc mở rộng các đặc tính sẵn có mà không cần định nghĩa lại.

Tính độc lập nền(Write Once, Run Anywhere): Java sử dụng cơ chế “Máy ảo của Java” (JVM) cho phép cung cấp môi trường thực thi cho chương trình Java trên nhiều nền tảng khác nhau.

Hướng dẫn cách cài đặt Java

BMD Solutions sẽ hướng dẫn chi tiết cách cài đặt Java (JDK). Java Development Kit là gì? Đây là bộ công cụ phát triển Java dành cho những bạn đang học lập trình Java, tự học Java giúp bạn dễ dàng viết code và chạy các chương trình lập trình Java.

Bước 1: Chọn phiên bản Java phù hợp và tải về máy

Java JDK cũng có phiên bản cho từng hệ điều hành riêng, do đó bạn cần cân nhắc để lựa chọn được một phiên bản phù hợp.

Bước 2: Tiến hành cài đặt Java JDK trên máy tính

Cũng giống như các phần mềm khác, sau khi tải file nén về máy, bạn ấn vào file và lựa chọn chạy file .exe để cài đặt Java JDK.

Bước 3: Cài đặt biến môi trường

Sau khi cài đặt Java JDK thành công, bạn sẽ cần lưu ý cài đặt các biến Path, Classpath trước khi bắt đầu vận hành.

Path: Cho biết vị trí của các tệp thực thi như javac, java,…

Classpath: Cho biết vị trí của tệp thư viện.

Để cài đặt 2 biến path, bạn làm theo các bước sau (với biến classpath làm tương tự):

Tại “My Computer” nhấp chuột phải -> Chọn “Properties”.

Click vào Advanced system settings.

Click vào Environment Variables.

Tại “User variables for Admin” chọn “New”.

Nhập PATH trong mục Variable name.

Copy đường dẫn thư mục bin đã được cài trong JDK.

Dán đường dẫn vừa Copy vào trong mục Variable value sau đó nhập “OK”.

Phần mềm giả lập Java trên PC

Bạn có biết phần mềm giả lập Java là gì không? Giả lập java trên PC đơn giản là khi bạn muốn sử dụng các ứng dụng của điện thoại trên máy tính với cấu hình và chất lượng tương đương. Hiện nay, phần lớn mọi người đều sử dụng phần mềm giả lập để chơi game thuận tiện lơn. Bạn có thể tham khảo một số phần mềm bên dưới:

Phần mềm giả lập KEmulator – Phần mềm giả lập Java trên PC chuyên nghiệp hàng đầu hiện nay với nhiều tính năng tuyệt vời hỗ trợ người dùng.

Phần mềm giả lập MidpX – Phần mềm giả lập lâu đời nhất, rất quen thuộc với người dùng Việt.

Phần mềm giả lập Sjboy-Java Emulator – Với phần mềm này, bạn có thể chạy hầu hết các ứng dụng và thậm chí có thể chụp màn hình trong khi trình giả lập Java này đang chạy.

Đọc thêm:

Python là gì?

Hướng dẫn tự học lập trình Java

Java là ngôn ngữ lập trình có độ phổ biến và ứng dụng cao, bởi vậy đây là một trong những kỹ năng tuyệt vời mà bạn nên học nếu muốn nâng cao sự nghiệp lập trình.

Có rất nhiều khóa học, giáo trình Java khác nhau mà bạn có thể tìm thấy chỉ bằng một cú click chuột. Bởi vậy, BMD Solutions sẽ hướng dẫn bạn xây dựng “khung sườn” để tự học lập trình Java hiệu quả nhất.

Tiến trình tự học lập trình Java

Để có nền tảng vững chắc, hãy bắt đầu học lập trình bằng cách tham gia một khóa học ngắn hạn. Điều bạn có thể làm ngay lập tức chính là tìm hiểu trước các thuật toán và nguyên tắc lập trình cơ bản với loại ngôn ngữ này. Ví dụ như:

Tìm hiểu về JDK, JRE và JVM.

Tìm hiểu về các biến, cách tạo ra biến, các hàm trong Java.

Nắm vững những kiểu dữ liệu nguyên thủy trong Java…

Bằng sự khởi đầu cơ bản nhất, tin rằng bạn sẽ có nền móng vững chắc trong tương lai. Đừng quên “Thực hành – thực hành và thực hành” nhiều lần với những gì học được bạn nhé.

Các giáo trình Java nên tham khảo

Học lập trình Java bằng sách

Bên cạnh việc theo học tại các trung tâm, trường học thì bạn cũng có thể tự học lập trình Java thông qua các giáo trình Java tham khảo. Một vài đầu sách hay mà bất cứ lập trình viên nào cũng nên biết để hiểu sâu Java là gì chính là:

Effective Java 3rd Edition.

Beginning Java 8 Language Features.

Spring Microservices in Action.

Kotlin in Action.

Bạn có thể chỉ mất một vài tuần hoặc vài tháng để đọc những tài liệu lập trình này nhưng giá trị mà nó mang lại sẽ là mãi mãi.

Công ty thiết kế ứng dụng Java chuyên nghiệp

Ngôn ngữ lập trình Java ra đời mang tới nhiều khả năng ưu việt và mở ra cơ hội với nhiều nhà đầu tư. Nếu bạn đang muốn sở hữu một ứng dụng/ website chuyên nghiệp lập trình bằng ngôn ngữ này thì hãy để chúng tôi giúp bạn.

BMD Solutions nhận thiết kế mọi dự án giải pháp công nghệ cho các công ty từ nhỏ đến lớn, hoặc nếu bạn là cá nhân và muốn đầu tư ứng dụng cho riêng mình thì cũng đừng ngần ngại liên hệ với chúng tôi, bởi mức giá mà BMD Solutions đưa ra luôn là hấp dẫn nhất thị trường.

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Giá cạnh tranh – Chất lượng cao – Bảo hành trọn đời chính là yếu tố giúp mọi sản phẩm của chúng tôi trở nên nổi bật trong hàng ngàn sản phẩm sẵn có trên thị trường!

Nguồn bài viết: Java Là Gì? “Bí Quyết” Để Học Ngôn Ngữ Lập Trình Này Hiệu Quả

source https://bmd.com.vn/java-la-gi/

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itsvenki · 5 years ago

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Our Java development services at Neumeric Technologies comprise of work on technologies like J2SE, J2EE, J2ME, and more.

#javadevelopmentcompany #j2eedevelopmentcompany #javaapplicationdevelopment #neumerictechnologies

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clearhologrampainter · 5 years ago

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Sap Java Net Cad Dca PHP Python Course Training In Jamshedpur

Security is the above all else worry in any SAP review. There ought to be legitimate isolation of obligations and access controls, which is vital to establishing the integrity of the controls for the framework. Sap Java Net Cad Dca PHP Python Course Training In Jamshedpur

At the point when an organization initially gets SAP it is practically without all safety efforts. When implementing SAP an organization must experience a broad procedure of outlining their procedures and afterward building their framework security starting from the earliest stage to guarantee appropriate isolation of obligations and legitimate access.

Appropriate profile structure and shirking of excess client ID's and superuser access will be significant in all periods of activity. Alongside this comes the significance of ensuring limited access to terminals, servers, and the server farm to forestall tampering. Since each organization will have various modules each organization's security structure will be distinctly unique.

An ordinary Example from SAP will make a Vendor and furthermore ready to pay an invoice. The Create a Vendor Transaction is XK01 and pay invoice exchange FB60. On the off chance that the User or Role in SAP has those two exchanges, at that point it will make a SOD Risk.

With security everything begins toward the beginning with the best possible structure and usage of security and access measures for representatives. For new workers it is significant that their entrance is set up appropriately and that future access conceded has legitimate endorsement.

After the framework has been actualized the command over framework changes and the endorsement procedure required for it is crucial to guarantee the continued security and usefulness of the framework. Without appropriate safety efforts set up all the way there will be a material shortcoming in the controls of the framework in view of this there will probably be some degree of misrepresentation also.

James Gosling, Mike Sheridan, and Patrick Naughton initiated the Java language venture in June 1991. Java was originally intended for interactive TV, yet it was excessively cutting-edge for the computerized satellite broadcast business at the time. The language was initially called Oak after an oak tree that remained outside Gosling's office. Later the task passed by the name Green and was finally renamed Java, from Java espresso, the espresso from Indonesia. Gosling planned Java with a C/C++-style sentence structure that framework and application developers would find familiar.

Sun Microsystems discharged the principal open execution as Java 1.0 in 1996. It guaranteed Write Once, Run Anywhere (WORA) usefulness, providing no-cost run-times on famous stages. Genuinely secure and featuring configurable security, it permitted network-and record get to limitations. Significant internet browsers before long incorporated the capacity to run Java applets within site pages, and Java immediately got famous.

The Java 1.0 compiler was re-written in Java by Arthur van Hoff to go along carefully with the Java 1.0 language specification. With the approach of Java 2 (discharged initially as J2SE 1.2 in December 1998 – 1999), new forms had various arrangements worked for various kinds of stages. J2EE included advances and APIs for big business applications regularly run in server situations, while J2ME highlighted APIs streamlined for portable applications. The work area form was renamed J2SE. In 2006, for marketing purposes, Sun renamed new J2 variants as Java EE, Java ME, and Java SE, individually.

The National Eligibility cum Entrance Test (Undergraduate) (NEET (UG)), prevailing from All India Pre-Medical Test (AIPMT) is a selection test in India for understudies who wish to examine undergrad clinical courses (MBBS) and dental courses (BDS) in government or private clinical universities and dental schools in India.

The undergrad NEET (UG), for MBBS and BDS courses, is right now led by the National Testing Agency (NTA), which gives the outcomes to the Directorate General of Health Services at the Ministry of Health and Family Welfare. Prior to 2019, the test was administered by the Central Board of Secondary Education (CBSE) in organization with Prometric Testing Pvt Ltd headquartered in the US. NEET-UG supplanted the All India Pre Medical Test (AIPMT) and all individual MBBS tests led by states or schools themselves in 2013. Be that as it may, numerous schools and institutes had taken a stay request and led private examinations for admission to their MBBS and BDS courses.

Starting around the mid 1960s, with the IBM Drafting System, PC helped structure frameworks started to give more capacity than only a capacity to replicate manual drafting with electronic drafting, the money saving advantage for organizations to change to CAD got evident.

The advantages of CAD frameworks over manual drafting are the capacities one regularly underestimates from PC frameworks today; robotized age of bills of materials, auto format in integrated circuits, interference checking, and numerous others. In the end, CAD gave the originator the capacity to perform engineering estimations. During this change, estimations were still performed either by hand or by those individuals who could run PC programs. CAD was a progressive change in the engineering industry, where artists, originators and engineering jobs begin to combine.

It didn't eliminate divisions as much as it consolidated offices and engaged sketcher, originators, and engineers. CAD is a case of the inescapable impact PCs were beginning to have on industry. Current PC supported plan programming bundles run from 2D vector-based drafting frameworks to 3D strong and surface modelers. Present day CAD bundles can likewise as often as possible permit turns in three measurements, allowing viewing of a planned item from any ideal point, even from the inside looking out. Some CAD programming is equipped for dynamic numerical modeling.

College bolstered teaching and examination staff in the Laboratory at the time were Maurice Wilkes (top of the lab), J. C. P. Mill operator, W. Renwick, E. N. Mutch, and S. Gill, joined somewhat later by C. B. Haselgrove.

In its final incarnation, the Diploma was a 10-month course, assessed 66% on examination and 33% on an undertaking exposition. A large portion of the examined courses were shared continuously year ("Part IB") of the undergrad Computer Science Tripos course, with some extra talks explicitly for the Diploma understudies and four of the third year undergrad ("Part II") address courses likewise included.

There were three evaluations of result from the Diploma: distinction (generally comparable to initially class respects), pass (identical to second or second rate class praises), and fall flat.

The standard PHP interpreter, controlled by the Zend Engine, is free programming discharged under the PHP License. PHP has been generally ported and can be sent on most web servers on pretty much every operating framework and stage, free of charge.

The PHP language advanced without a composed proper determination or standard until 2014, with the original execution acting as the accepted standard which different usage expected to follow. Since 2014, work has proceeded to make a formal PHP specification.

Python 3.0, discharged in 2008, was a significant update of the language that isn't totally in reverse perfect, and much Python 2 code doesn't run unmodified on Python 3.

The Python 2 language was authoritatively discontinued in 2020 (first made arrangements for 2015), and "Python 2.7.18 is the last Python 2.7 discharge and in this manner the last Python 2 release." No greater security patches or different enhancements will be discharged for it. With Python 2's finish of-life, just Python 3.5.x and later are upheld.

Python interpreters are accessible for some operating frameworks. A worldwide network of software engineers creates and maintains CPython, an open source reference execution. A non-benefit association, the Python Software Foundation, oversees and coordinates assets for Python and CPython improvement.

Physical training focuses on unthinking objectives: training programs around there create explicit engine aptitudes, dexterity, quality or physical wellness, regularly with an intention of peaking at a specific time.

In military use, training implies gaining the physical capacity to perform and get by in battle, and become familiar with the numerous aptitudes required in a period of war. These include how to utilize an assortment of weapons, open air ingrained instincts, and how to endure being caught by the adversary, among numerous others. See military instruction and training.

For mental or physiological reasons, individuals who trust it might be useful to them can decide to rehearse unwinding training, or autogenic training, in an endeavor to increase their capacity to unwind or manage stress. While a few examinations have indicated unwinding training is helpful for some ailments, autogenic training has constrained outcomes or has been the aftereffect of barely any investigations.

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siva3155 · 6 years ago

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300+ TOP J2ME Interview Questions and Answers

J2ME Interview Questions for freshers experienced :-

1 . What is J2ME ? Java 2, Micro Edition is a group of specifications and technologies that pertain to Java on small devices. The J2ME moniker covers a wide range of devices, from pagers and mobile telephones through set-top boxes and car navigation systems. The J2ME world is divided into configurations and profiles, specifications that describe a Java environment for a specific class of device. 2. What is J2ME WTK ? The J2ME Wireless Toolkit is a set of tools that provides developers with an emulation environment, documentation and examples for developing Java applications for small devices. The J2ME WTK is based on the Connected Limited Device Configuration (CLDC) and Mobile Information Device Profile (MIDP) reference implementations, and can be tightly integrated with Forte for Java 3. What is 802.11 ? 802.11 is a group of specifications for wireless networks developed by the Institute of Electrical and Electronics Engineers (IEEE). 802.11 uses the Ethernet protocol and CSMA/CA (carrier sense multiple access with collision avoidance) for path sharing. 4. What is API ? An Application Programming Interface (API) is a set of classes that you can use in your own application. Sometimes called libraries or modules, APIs enable you to write an application without reinventing common pieces of code. For example, a networking API is something your application can use to make network connections, without your ever having to understand the underlying code. 5. What is WTP ? Wireless Transaction Protocol (WTP) is WAP's transaction protocol that works between the session protocol WSP and security protocol WTLS. WTP chops data packets into lower level datagrams and concatenates received datagrams into useful data. WTP also keeps track of received and sent packets and does re-transmissions and acknowledgment sending when needed. 6. What is CDC ? The Connected Device Configuration (CDC) is a specification for a J2ME configuration. Conceptually, CDC deals with devices with more memory and processing power than CLDC; it is for devices with an always-on network connection and a minimum of 2 MB of memory available for the Java system. 7. What is CDMA ? Code-Division Multiple Access (CDMA) is a cellular technology widely used in North America. There are currently three CDMA standards: CDMA One, CDMA2000 and W-CDMA. CDMA technology uses UHF 800Mhz-1.9Ghz frequencies and bandwidth ranges from 115Kbs to 2Mbps. 8. What is CDMA One ? Also know as IS-95, CDMA One is a 2nd generation wireless technology. Supports speeds from 14.4Kbps to 115K bps. 9. What is CDMA2000 ? Also known as IS-136, CDMA2000 is a 3rd generation wireless technology. Supports speeds ranging from 144Kbps to 2Mbps. 10. What is CDPD ? Developed by Nortel Networks, Cellular Digital Packet Data (CDPD) is an open standard for supporting wireless Internet access from cellular devices. CDPD also supports Multicast, which allows content providers to efficiently broadcast information to many devices at the same time.

J2ME Interview Questions 11. What is cHTML ? Compact HTML (cHTML) is a subset of HTML which is designed for small devices. The major features of HTML that are excluded from cHTML are: JPEG image, Table, Image map, Multiple character fonts and styles, Background color and image, Frame and Style sheet. 12. What is CLDC ? The Connected, Limited Device Configuration (CLDC) is a specification for a J2ME configuration. The CLDC is for devices with less than 512 KB or RAM available for the Java system and an intermittent (limited) network connection. It specifies a stripped-down Java virtual machine1 called the KVM as well as several APIs for fundamental application services. Three packages are minimalist versions of the J2SE java.lang, java.io, and java.util packages. A fourth package, javax.microedition.io, implements the Generic Connection Framework, a generalized API for making network connections. 13. What is configuration ? In J2ME, a configuration defines the minimum Java runtime environment for a family of devices: the combination of a Java virtual machine (either the standard J2SE virtual machine or a much more limited version called the CLDC VM) and a core set of APIs. CDC and CLDC are configurations. See also profile, optional package. 14. What is CVM ? The Compact Virtual Machine (CVM) is an optimized Java virtual machine1 (JVM) that is used by the CDC. 15. What is Deck ? A deck is a collection of one or more WML cards that can be downloaded, to a mobile phone, as a single entity. 16. What is EDGE ? Enhanced Data GSM Environment (EDGE) is a new, faster version of GSM. EDGE is designed to support transfer rates up to 384Kbps and enable the delivery of video and other high-bandwidth applications. EDGE is the result of a joint effort between TDMA operators, vendors and carriers and the GSM Alliance. 17. What is ETSI ? The European Telecommunications Standards Institute (ETSI) is a non-profit organization that establishes telecommunications standards for Europe. 18. What is FDMA ? Frequency-division multiple-access (FDMA) is a mechanism for sharing a radio frequency band among multiple users by dividing it into a number of smaller bands. 19. What is Foundation Profile ? The Foundation Profile is a J2ME profile specification that builds on CDC. It adds additional classes and interfaces to the CDC APIs but does not go so far as to specify user interface APIs, persistent storage, or application life cycle. Other J2ME profiles build on the CDC/Foundation combination: for example, the Personal Profile and the RMI Profile both build on the Foundation Profile. 20. What is Generic Connection Framework ? The Generic Connection Framework (GCF) makes it easy for wireless devices to make network connections. It is part of CLDC and CDC and resides in the javax.microedition.io package. 21. What is GPRS ? The General Packet Radio System (GPRS) is the next generation of GSM. It will be the basis of 3G networks in Europe and elsewhere. 22. What is GSM ? The Global System for Mobile Communications (GSM) is a wireless network system that is widely used in Europe, Asia, and Australia. GSM is used at three different frequencies: GSM900 and GSM1800 are used in Europe, Asia, and Australia, while GSM1900 is deployed in North America and other parts of the world. 23. What is HLR ? The Home Location Register (HLR) is a database for permanent storage of subscriber data and service profiles. 24. What is HTTPS ? Hyper Text Transfer Protocol Secure sockets (HTTPS) is a protocol for transmission of encrypted hypertext over Secure Sockets Layer. 25. What is i-appli ? Sometimes called "Java for i-mode", i-appli is a Java environment based on CLDC. It is used on handsets in NTT DoCoMo's i-mode service. While i-appli is similar to MIDP, it was developed before the MIDP specification was finished and the two APIs are incompatible. 26. What is IDE ? An Integrated Development Environment (IDE) provides a programming environment as a single application. IDEs typically bundle a compiler, debugger, and GUI builder tog ether. Forte for Java is Sun's Java IDE. 27. What is iDEN ? The Integrated Dispatch Enhanced Network (iDEN) is a wireless network system developed by Motorola. Various carriers support iDEN networks around the world: Nextel is one of the largest carriers, with networks covering North and South America. 28. What is i-mode ? A standard used by Japanese wireless devices to access cHTML (compact HTML) Web sites and display animated GIFs and other multimedia content. 29. What is 3G ? Third generation (3G) wireless networks will offer faster data transfer rates than current networks. The first generation of wireless (1G) was analog cellular. The second generation (2G) is digital cellular, featuring integrated voice and data communications. So-called 2.5G networks offer incremental speed increases. 3G networks will offer dramatically improved data transfer rates, enabling new wireless applications such as streaming media. 30. What is 3GPP ? The 3rd Generation Partnership Project (3GPP) is a global collaboration between 6 partners: ARIB, CWTS, ETSI, T1, TTA, and TTC. The group aims to develop a globally accepted 3rd-generation mobile system based on GSM. 31. What is Java Card ? The Java Card specification allows Java technology to run on smart cards and other small devices. The Java Card API is compatible with formal international standards, such as, ISO7816, and industry-specific standards, such as, Europay/Master Card/Visa (EMV). 32. What is JavaHQ ? JavaHQ is the Java platform control center on your Palm OS device. 33. What is JCP ? The Java Community Process (JCP) an open organization of international Java developers and licensees who develop and revise Java technology specifications, reference implementations, and technology compatibility kits through a formal process. 34. What is JDBC for CDC/FP ? The JDBC Optional Package for CDC/Foundation Profile (JDBCOP for CDC/FP) is an API that enables mobile Java applications to communicate with relational database servers using a subset of J2SE's Java Database Connectivity. This optional package is a strict subset of JDBC 3.0 that excludes some of JDBC's advanced and server-oriented features, such as pooled connections and array types. It's meant for use with the Foundation Profile or its supersets. 35. What is JSR ? Java Specification Request (JSR) is the actual description of proposed and final specifications for the Java platform. JSRs are reviewed by the JCP and the public before a final release of a specification is made. 36. What is KittyHawk ? KittyHawk is a set of APIs used by LG Telecom on its IBook and p520 devices. KittyHawk is based on CLDC. It is conceptually similar to MIDP but the two APIs are incompatible. 37. What is KJava ? KJava is an outdated term for J2ME. It comes from an early package of Java software for PalmOS, released at the 2000 JavaOne show. The classes for that release were packaged in the com.sun.kjava package. 38. What is kSOAP ? kSOAP is a SOAP API suitable for the J2ME, based on kXML. 39. What is kXML ? The kXML project provides a small footprint XML parser that can be used with J2ME. 40. What is KVM ? The KVM is a compact Java virtual machine (JVM) that is designed for small devices. It supports a subset of the features of the JVM. For example, the KVM does not support floating-point operations and object finalization. The CLDC specifies use of the KVM. According to folklore, the 'K' in KVM stands for kilobyte, signifying that the KVM runs in kilobytes of memory as opposed to megabytes. 41. What is LAN ? A Local Area Network (LAN) is a group of devices connected with various communications technologies in a small geographic area. Ethernet is the most widely-used LAN technology. Communication on a LAN can either be with Peer-to-Peer devices or Client-Server devices. 42. What is LCDUI ? LCDUI is a shorthand way of referring to the MIDP user interface APIs, contained in the javax.microedition.lcdui package. Strictly speaking, LCDUI stands for Liquid Crystal Display User Interface. It's a user interface toolkit for small device screens which are commonly LCD screens. 43. What is MExE ? The Mobile Execution Environment (MExE) is a specification created by the 3GPP which details an applicatio n environment for next generation mobile devices. MExE consists of a variety of technologies including WAP, J2ME, CLDC and MIDP. 44. What is MIDlet ? A MIDlet is an application written for MIDP. MIDlet applications are subclasses of the javax.microedition.midlet.MIDlet class that is defined by MIDP. 45. What is MIDlet suite ? MIDlets are packaged and distributed as MIDlet suites. A MIDlet suite can contain one or more MIDlets. The MIDlet suite consists of two files, an application descriptor file with a .jad extension and an archive file with a .jar file. The descriptor lists the archive file name, the names and class names for each MIDlet in the suite, and other information. The archive file contains the MIDlet classes and resource files. 46. What is MIDP ? The Mobile Information Device Profile (MIDP) is a specification for a J2ME profile. It is layered on top of CLDC and adds APIs for application life cycle, user interface, networking, and persistent storage. 47. What is MIDP-NG ? The Next Generation MIDP specification is currently under development by the Java Community Process. Planned improvements include XML parsing and cryptographic support. 48. What is Mobitex ? Mobitex is a packet-switched, narrowband PCS network, designed for wide-area wireless data communications. It was developed in 1984 by Eritel, an Ericsson subsidiary, a nd there are now over 30 Mobitex networks in operation worldwide. 49. What is Modulation ? Modulation is the method by which a high-frequency digital signal is grafted onto a lower-frequency analog wave, so that digital packets are able to ride piggyback on the analog airwave. 50. What is MSC ? A Mobile Switching Center (MSC) is a unit within a cellular phone network that automatically coordinates and switches calls in a given cell. It monitors each caller's signal strength, and when a signal begins to fade, it hands off the call to another MSC that's better positioned to manage the call. 51. What is Obfuscation ? Obfuscation is a technique used to complicate code. Obfuscation makes code harder to understand when it is de-compiled, but it typically has no affect on the functionality of the code. Obfuscation programs can be used to protect Java programs by making them harder to reverse-engineer. 52. What is optional package ? An optional package is a set of J2ME APIs providing services in a specific area, such as database access or multimedia. Unlike a profile, it does not define a complete application environment, but rather is used in conjunction with a configuration or a profile. It extends the runtime environment to support device capabilities that are not universal enough to be defined as part of a profile or that need to be shared by different profiles. J2ME RMI and the Mobile Media RMI are examples of optional packages. 53. What is OTA ? Over The Air (OTA) refers to any wireless networking technology. 54. What is PCS ? Personal Communications Service (PCS) is a suite of second-generation, digitally modulated mobile-communications interfaces that includes TDMA, CDMA, and GSM. PCS serves as an umbrella term for second-generation wireless technologies operating in the 1900MHz range 56. What is PDAP ? The Personal Digital Assistant Profile (PDAP) is a J2ME profile specification designed for small platforms such as PalmOS devices. You can think of PDAs as being larger than mobile phones but smaller than set-top boxes. PDAP is built on top of CLDC and will specify user interface and persistent storage APIs. PDAP is currently being developed using the Java Community Process (JCP). 57. What is PDC ? Personal Digital Cellular (PDC) is a Japanese standard for wireless communications. 58. What is PDCP ? Parallel and Distributed Computing Practices (PDCP) are often used to describe computer systems that are spread over many devices on a network (wired or wireless) where many nodes process data simultaneously. 59. What is Personal Profile ? The Personal Profile is a J2ME profile specification. Layered on the Foundation Profile and CDC, the Personal Profile will be the next generation of PersonalJava technology. The specification is currently in development under the Java Community Process (JCP). 60. What is PersonalJava ? PersonalJava is a Java environment based on the Java virtual machine1 (JVM) and a set of APIs similar to a JDK 1.1 environment. It includes the Touchable Look and Feel (also called Truffle), a graphic toolkit that is optimized for consumer devices with a touch sensitive screen. PersonalJava will be included in J2ME in the upcoming Personal Profile, which is built on CDC. 61. What is PNG ? Portable Network Graphics (PNG) is an image format offering lossless compression and storage flexibility. The MIDP specification requires implementations to recognize certain types of PNG images. 62. What is POSE ? Palm OS Emulator (POSE). 63. What is PRC ? Palm Resource Code (PRC) is the file format for Palm OS applications. 64. What is preverification ? Due to memory and processing power available on a device, the verification process of classes are split into two processes. The first process is the preverification which is off-device and done using the preverify tool. The second process is verification which is done on-device. 65. What is profile ? A profile is a set of APIs added to a configuration to support specific uses of a mobile device. Along with its underlying configuration, a profile defines a complete, and usually self-contained, general-purpose application environment. Profiles often, but not always, define APIs for user interface and persistence; the MIDP profile, based on the CLDC configuration, fits this pattern. Profiles may be supersets or subsets of other profiles; the Personal Basis Profile is a subset of the Personal Profile and a superset of the Foundation Profile. See also configuration, optional package. 66. What is Provisioning ? In telecommunications terms, provisioning means to provide telecommunications services to a user. This includes providing all necessary hardware, software, and wiring or transmission devices. 67. What is PSTN ? The public service telephone network (PSTN) is the traditional, land-line based system for exchanging phone calls. 68. What is RMI ? Remote method invocation (RMI) is a feature of J2SE that enables Java objects running in one virtual machine to invoke methods of Java objects running in another virtual machine, seamlessly. 69. What is RMI OP ? The RMI Optional Package (RMI OP) is a subset of J2SE 1.3's RMI functionality used in CDC-based profiles that incorporate the Foundation Profile, such as the Personal Basis Profile and the Personal Profile. The RMIOP cannot be used with CLDC-based profiles because they lack object serialization and other important features found only in CDC-based profiles. RMIOP supports most of the J2SE RMI functionality, including the Java Remote Method Protocol, marshalled objects, distributed garbage collection, registry-based object lookup, and network class loading, but not HTTP tunneling or the Java 1.1 stub protocol. 70. What is RMI Profile ? The RMI Profile is a J2ME profile specification designed to support Java's Remote Method Invocation (RMI) distributed object system. Devices implementing the RMI Profile will be able to interoperate via RMI with other Java devices, including Java 2, Standard Edition. The RMI Profile is based on the Foundation Profile, which in turn is based on CDC. 71. What is RMS ? The Record Management System (RMS) is a simple record-oriented database that allows a MIDlet to persistently store information and retrieve it later. Different MIDlets can also use the RMS to share data. 72. What is SDK ? A Software Development Kit (SDK) is a set of tools used to develop applications for a particular platform. An SDK typically contains a compiler, linker, and debugger. It may also contain libraries and documentation for APIs. 73. What is SIM ? A Subscriber Identity Module (SIM) is a stripped-down smart card containing information about the identity of a cell-phone subscriber, and subscriber authentication and service information. Because the SIM uniquely identifies the subscriber and is portable among handsets, the user can move it from one kind of phone to another, facilitating international roaming. 74. What is SMS ? Short Message Service (SMS) is a point-to-point service similar to paging for sending text messages of up to 160 characters to mobile phones. 75. What is SOAP ? The Simple Object Access Protocol (SOAP) is an XML- based protocol that allows objects of any type to communicated in a distributed environment. SOAP is used in developing Web Services. 76. What is SSL ? Secure Sockets Layer (SSL) is a socket protocol that encrypts data sent over the network and provides authentication for the socket endpoints. 77. What is T9 ? T9 is a text input method for mobile phones and other small devices. It replaces the "multi-tap" input method by guessing the word that you are trying to enter. T9 may be embedded in a device by the manufacturer. Note that even if the device supports T9, the Java implementation may or may not use it. Check your documentation for details. 78. What is TDMA ? Time Division Multiple Access (TDMA) is a second-generation modulation standard using bandwidth allocated in the 800 MHz, 900 MHz, and 1900MHz ranges. 79. What is Telematics ? Telematics is a location-based service that routes event notification and control data over wireless networks to and from mobile devices installed in automobiles. Telematics makes use of GPS technology to track vehicle latitude and longitude, and displays maps in LED consoles mounted in dashboards. It connects to remote processing centers that turn provide server-side Internet and voice services, as well as access to database resources. 80. What is Tomcat ? Tomcat is a reference implementation of the Java servlet and JavaServer Pages (JSP) specifications. It is intended as a platform for developing and testing servlets. 81. What is UDDI ? Universal Description, Discovery, and Integration (UDDI) is an XML-based standard for describing, publishing, and finding Web services. UDDI is a specification for a distributed registry of Web services. 82. What is UMTS ? Developed by Nortel Networks, Universal Mobile Telecommunications Service (UMTS) is a standard that will provide cellular users a consistent set of technologies no matter where they are located worldwide. UMTS utilizes W-CDMA technology. 83. What is VLR ? The Visitor Location Register (VLR) is a database that contains temporary information about subscribers. 84. What is WAE ? The Wireless Application Environment (WAE) provides a application framework for small devices. WAE leverages other technologies such as WAP, WTP, and WSP. 85. What is WAP ? Wireless Application Protocol (WAP) is a protocol for transmitting data between servers and clients (usually small wireless devices like mobile phones). WAP is analogous to HTTP in the World Wide Web. Many mobile phones include WAP browser software to allow users access to Internet WAP sites. 86. What is WAP Gateway ? A WAP Gateway acts as a bridge allowing WAP devices to communicate with other networks (namely the Internet). 87. What is W-CDMA ? Wideband Code-Division Multiple Access (W-CDMA), also known as IMT-2000, is a 3rd generation wireless technology. Supports speeds up to 384Kbps on a wide-area network, or 2Mbps locally. 88. What is WDP ? Wireless Datagram Protocol (WDP) works as the transport layer of WAP. WDP processes datagrams from upper layers to formats required by different physical datapaths, bearers, that may be for example GSM SMS or CDMA Packet Data. WDP is adapted to the bearers available in the device so upper layers don't need to care about the physical level. 88. What is WMA ? The Wireless Messaging API (WMA) is a set of classes for sending and receiving Short Message Service messages. See also SMS. 89. What is WML ? The Wireless Markup Language (WML) is a simple language used to create applications for small wireless devices like mobile phones. WML is analogous to HTML in the World Wide Web. 90. What is WMLScript ? WMLScript is a subset of the JavaScript scripting language designed as part of the WAP standard to provide a convenient mechanism to access mobile phone's peripheral functions. 91. What is WSP ? Wireless Session Protocol (WSP) implements session services of WAP. Sessions can be connection-oriented and connectionless and they may be suspended and resumed at will. 92. What is WTLS ? Wireless Transport Layer Security protocal (WTLS) does all cryptography oriented features of WAP. WTLS handles encryption/decryption, user authentication and data integrity. WTLS is based on the fixed network Transport Layer Security protocal (TLS), formerly known as Secure Sockets Layer (SSL). 93. What is AMPS ? Advanced Mobile Phone Service (AMPS) is a first-generation analog, circuit-switched cellular phone network. Originally operating in the 800 MHz band, service was later expanded to include transmissions in the 1900 MHz band, the VHF range in which most wireless carriers operate. Because AMPS uses analog signals, it cannot transmit digital signals and cannot transport data packets without assistance from newer technologies such as TDMA and CDMA. J2ME Questions with Answers Pdf Download Read the full article

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