#Java Inter Thread Communication

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Core Java with Threading expert

Core Java with Threading expert Alpharetta, GA – Must local and hybrid roleWe need a strong resource who has very strong experience in Core Java and Multithreading to work in the Trading area .Should have 10+ years of EXPERT level experience with deep understanding how it works in Core Java and Threading (Locking, Transaction management, handling Inter communication of services etc), Handling…

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Achieving Thread Safety: Exploring Synchronization in Java Development

Introduction: In the world of Java development, synchronization plays a crucial role in ensuring thread safety and preventing race conditions when multiple threads access shared resources. As a vital component of JAVA Development, a career in Software development, and Java developer jobs, understanding synchronization in Java is essential for building robust and reliable applications. In this article, we delve into the intricacies of synchronization, highlighting its significance in software development.

Understanding Synchronization in Java: Synchronization is a mechanism that allows for the coordination of multiple threads to ensure orderly and predictable execution. In Java, synchronization is achieved through the use of monitors, which are associated with objects or class methods. By synchronizing access to shared resources, synchronization prevents data corruption and race conditions that can occur when multiple threads access and modify shared data simultaneously.

Key Concepts of Synchronization in Java:

Monitor: A monitor is a concept in Java that associates a lock with each object. The lock ensures that only one thread can access the synchronized portion of code or the shared resource at any given time. Other threads attempting to access the locked code or resource will be blocked until the lock is released.

Synchronized Blocks: Synchronized blocks are used to define sections of code that should be executed by only one thread at a time. By enclosing critical sections of code within synchronized blocks, developers can ensure thread safety and prevent concurrent modifications of shared resources.

Intrinsic Locks: In Java, every object has an intrinsic lock, also known as a monitor lock or a mutex. The intrinsic lock is acquired by a thread when it enters a synchronized block associated with the object. Only one thread can hold the intrinsic lock for an object at a time.

Object-Level and Class-Level Synchronization: Synchronization can be applied at the object level or the class level. Object-level synchronization ensures that only one thread can access the synchronized instance method or the synchronized block associated with a particular object. Class-level synchronization ensures that only one thread can access the synchronized static method or the synchronized block associated with a class.

Benefits of Synchronization in Java Development: Synchronization offers several benefits for professionals in JAVA Development, a career in Software development, and Java developer jobs. Some key advantages include:

Thread Safety: Synchronization ensures thread safety by preventing race conditions and data corruption that can occur when multiple threads access shared resources simultaneously. By synchronizing access to critical sections of code, developers can avoid inconsistent states and ensure data integrity.

Consistency: Synchronization promotes consistency in multi-threaded environments by enforcing a particular order of execution. By ensuring that only one thread can access synchronized blocks or methods at a time, synchronization allows for predictable and orderly execution.

Resource Sharing: Synchronization facilitates the sharing of resources among multiple threads in a controlled manner. By providing exclusive access to shared resources, synchronization enables proper coordination and avoids conflicts that may arise when multiple threads try to modify the same resource simultaneously.

Inter-Thread Communication: Synchronization is often used in conjunction with techniques like wait() and notify() to enable inter-thread communication. By using these methods within synchronized blocks, threads can effectively communicate and coordinate their activities.

Scalability: Synchronization allows for scalable multi-threaded applications by ensuring that critical sections of code are accessed sequentially. This enables efficient utilization of resources and prevents bottlenecks that can hinder performance.

Conclusion: Synchronization is a critical aspect of Java development that ensures thread safety, consistency, and resource sharing in multi-threaded environments. Proficiency in working with synchronization is essential for professionals in JAVA Development, a career in Software development, and Java developer jobs. By leveraging the capabilities of synchronization, developers can build robust, reliable, and scalable applications. Understanding the nuances of synchronization empowers Java developers to excel in the dynamic and evolving field of software development, enabling them to create multi-threaded applications that are free from race conditions and data inconsistencies.

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Oxford Certified Java Professional

Oxford Certified Java Professional

Java is versatile as it can be used for a large number of things, including Software Development, Mobile Applications, and Large Systems Development, with the current statistics of it owning 88% market share as Mobile OS Android, putting it in the forefront. Oxford Software Institute, tapping its worth in the IT industry, provides the best classes in Java in Delhi. Through this course, we will provide the students a thorough understanding of the Java language and its role in the Object-Oriented World.

INTRODUCTION OF JAVA

This session will focus on History and Features of Java, Java Development Kit, Coding and Compiling through command prompt and NetBeans, Classes, Anatomy of Methods, Keywords, Data Types, Variables, Primitive / Abstract / Derived Data Types, Operators, Operator Precedence; Control Flow Statements like If-else and Switch Statement, Looping with For, While, Do…While, Break and Continue Statement, Arrays, Array of Object References, Accessing Arrays, Manipulating Arrays.

JAVA OOP CONCEPTS

In this session, we will focus on Classes and Objects, Defining A Class, Defining Instance Variables And Methods, Creating Object, Access Modifiers, Method calls via Object References, Constructors, Inheritance, extends and implements keywords in Java, Abstraction, Interfaces, Abstract and non-Abstract methods, Super class and Sub class, this keyword, super keyword, final in Java, Static variables and methods, Polymorphism, Overloading and Overriding of methods, Encapsulation, Java Bean, POJO, Getters/Setters, Memory management in Java, Heap, Stack, Package, Import statement and much more.

STRING, EXCEPTIONS AND FILE HANDLING

We will cover extensively the topic Strings, Immutability in Strings, String Creation on heap and constant pool, Method APIs on String, StringBuilder and StringBuffer, Splitting of Strings and StringTokenizer class, Exceptions - try, catch, finally, throw, throws, Rules for coding Exceptions, Declaring Exceptions, Defining and Throwing Exceptions, Errors and Runtime Exceptions, Custom Exception, Assertions, Enabling and disabling assertions in development environment, stream, Bytes vs. Characters, Java IO API, Reading and Writing to a file with APIs, Reading User input, PrintWriter Class and much more.

MULTITHREADING, COLLECTIONS AND SERIALIZATION

We will cover advance topics like Non-Threaded Applications and Threaded Applications, Multitasking – Process and Threaded, Creating Threads, States and Synchronization of threads, Concept of object and class locks, Coordination between threads, Inter-Thread Communication, Collections Framework, Collections API, Set, List, Map and Queue Interfaces and their implementation, Utility classes, Sorting collection, Primitive wrapper classes, Generics for Collections, Object Serialization, Serializable Interface, Serialization API, ObjectInputStream and ObjectOutput, readObject and writeObject.

JAVA APPLETS, SWING GUI AND JDBC

We will cover Applets, Event Handlers, Mouse and Click Events, AWT, Swing GUI, Advantages of Swing over AWT, Swing API, Swing GUI Components, Event Handlers, Sample Calculator application using Swing GUI and Swing Event handling, Introduction to JDBC, JDBC features and Architecture, java.sql package, Setting Up a Database and Creating a Schema, Writing JDBC code to connect to DB, Connection, Statement, ResultSet, Rowset, Prepared Statement, Batch Updates, ResultSetMetaData, Simple Transaction Management and their pros & cons, Features of JDBC 3.0, CRUD Operations with JDBC and much more

SOFT SKILLS

Having a technical and discipline-specific expertise can help you get to the interview room but it’s the soft skills that will make the hiring manager hand you the appointment letter. In this course, students will also learn various Soft Skills like how to communicate professionally in English, Speaking in public without hesitation, using effective gestures and postures to appear impressive, managing stress and emotions and taking successful interviews. Oxford Software Institute provides the best classes in Soft-skill training.

CERTIFICATIONS*

During this course, students will be trained for the following certifications

Oxford Certified JAVA Professional.

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Future Programming Languages 2025 2030

Which is best Future Programming Languages 2025 2030. When programmers are about to start their coding journey, it is difficult to decide on where to start. Here is a list of the future technology programming languages having a high demand in 2025 and 2030. 

What are the Future Programming Languages 2025 2030 technology having a high demand in 2025 and 2030

Swift 

If you are a mobile developer, Swift is perfect for you! Apple developed it for creating IOS and Mac OS Applications. it remains one of the most in-demand languages of 2021 and will continue to have a high demand in 2025 and also 2030.  Swift is also easy to learn and supports almost everything from objective-C. It is a general-purpose, multi-program compiled programming language. It's Mac-base and if you become good with it, then it's easier to make more money than Android developers. Swift is fast, efficient, secure, enables a high level of interactivity by combining forefront language features. It is a general-purpose programming language built using a modern approach to safety performance and software design patterns. The goal of the swift project is to create the best language for users ranging from systems programming to mobile and also desktop apps scaling up to cloud services. Companies using Swift- Apple, Lyft, Uber.  Python 

Python is undoubtedly a Powerhouse. Its applications extend in many domains like web development, data science, data visualisation, machine learning, artificial intelligence web scraping and also others. It is one of the most popular languages and it is very easy to learn with a vast community and many open source projects. The drawbacks are mainly its slow interpretation since it is a high level language. Python is on top of the job demands and also it has the highest average wages in the tech industry. It is easy to learn. This programming language is great for beginners. It is often use as a scripting language for web applications. Python is the lingua franca of machine learning and also data science. Python's popularity Rose by 3.48% which is very impressive. In Python,  coding are the dynamic type. In coding, you don't need to declare the type of variable. The syntax of python is easy to remember, almost similar to human language. Companies using Python- Instagram, Amazon, Facebook and Spotify.  Java 

Firstly, Java is the leading enterprise programming language at the moment. Java will also be high in demand in 2025 and 2030. It is a general-purpose language use for web pages, and much more and also is the Android dominant language, and it is powerful. It supports distributed computing and multi-threading. And also It is very secure, and it Moves the biggest Enterprises and data centers globally. Today 15 billion devices run Java, and it is being use by 10 million developers worldwide. It is freely accessible and we can run it on all the platforms of the operating systems. Java is best for embedded and also cross-platform applications. Java has a larger number of frameworks and has long lines of code. It is use to develop desktop and mobile applications, big data processing, embedded systems, and so on.  Companies using Java- Uber, Netflix, Instagram, Google Kotlin 

The effortless interoperation between Java and Kotlin Android development is faster and also enjoyable. Scotland addresses the major issues that surfaced in Java,  developers have rewritten several Java apps in Kotlin. The syntax is easy to learn for beginners and also it offers a host of powerful features. It can be a great language to upskill for experienced programmers. It has a Shallow learning curve especially if you have experience in Python or Java. Kotlin is a cross-platform, statically typed, general-purpose programming language with Type inference. It is develop to inter-operate completely with Java. Recently, Google announced that Android development will be increasingly Kotlin- first and that many top apps have already migrated to Kotlin.  Companies using Kotlin- Courser, Uber, Pinterest.  JavaScript

It is the most popular language according to a Stack overflow survey. It is widely know for adding interactive elements to web applications and also browsers. JavaScript is the ultimate language of the web. Almost every web and also mobile application run JavaScript. Since it is a client-side language, many simple applications don't need server support and in the case of complex applications, it produces a server load. There is an insane growth in the usage of this language as well. And also It is also the foundation of most libraries and frameworks for the web surcharge React, Vue and Node. It can run inside nearly all modern web browsers. It is a programming language used primarily by web browsers to create a dynamic and also interactive experience for the users.  Companies using JavaScript- PayPal, Google, Microsoft  Rust 

Rest is a multi-paradigm programming language focused on performance and safety. Rust is syntactically similar to C++. It offers the safety of memory with no use of garbage collection. Rust has great documentation. A friendly compiler with useful error messages and top-notch tooling- an integrated package manager and also build tool. Rust is the language of the future. And also It is the most loved language and one of the highest paying languages in the world. It empowers everyone to build reliable and efficient software. It has the speed and also low-level access of languages like C/C++  with memory security like modern languages. This programming language can run on embedded devices. Rust can easily integrate with other languages. Hundreds of companies Around The World are using rust in production today for fast, low-resource, cross-platform solutions. Companies using Rust- Dropbox, Figma, Discord C++

Firslty, It is a powerful general-purpose programming language. It can develop operating systems, browsers, games, and so on. C++ supports different ways of programming like procedural, object-oriented, functional, and so on. This makes C++ powerful as well as flexible. C++  is old but gold. It is highly use for professional software game development and also high-performance applications. This includes machine learning. It gives programmers a high level of control over the system's resources and memory. We can find this language in today's operating system, graphical user interface, and also embedded systems. It is close to C# and Java;  it makes it easy for programmers to switch to C++ or vice versa. And also was develop as an enhancement of the C language to include an object-orient paradigm.  Companies using C++ - Evernote, Microsoft, Opera, Facebook PHP PHP is a popular general-purpose scripting language that is especially suit for web development. Fast, flexible and pragmatic, PHP powers everything from your blog to the most popular websites in the world. Statistics show that 80% of the top 10 million websites. It creates, reads, opens, deletes, and also closes files on the server. It controls user access and also encrypts data. A wonderful benefit of using PHP is that it can interact with many database languages including my SQL. PHP is free to download and use. And also It is powerful enough to be at the core of the biggest blogging system on the web- WordPress! It is compatible with almost all servers use today like Apache, IIS, and others. It is deep enough to run the largest social network- Facebook. PHP can be easily embed in HTML files and HTML code can also be write in a PHP file.  Companies using PHP- Facebook, Tumblr, Etsy, WordPress C#

C-Sharp is a programming language developed by Microsoft. It runs on the .NET framework. It is use to develop web apps, desktop apps, games, and also much more. Microsoft developed C Sharp as a rival to Java. It is highly use in the enterprise environment and also for game development with the Unity engine. C# gives its free hand to create applications not only for Websites but also for mobile applications. Although it has common points with structure programming languages, it is accept as an object-oriented programming language. There are a massive number of out-of-the-box solutions that you can find in this Programming language but not in other programming languages. For example, tools for unit testing, crypto library, Marvellous collections handling and multi-threading.  Companies using C#- CarMax, RTX, Twitch Scala 

Scala is a programming language that combines Object-oriented programming with functional programming. And also It has a strong static type system and is design to be concise. It operates on the JVM. Also, It is a hybrid of two Programming Paradigms. It tries to address all the criticisms of Java, in which you can keep all the Java libraries and all the advantages of the JVM. At the same time, your code is more concise. Scala is oftentimes use in data science. Scala is a very compatible language and can be very easily install into windows and the Unix operating system easily. This language is useful for developers to enhance their business applications to be more productive, scalable, and reliable. There is no concept of primitive data as everything is an object in Scala. It is design to express the general programming patterns in a refine, succinct, and type-safety way.  Companies Using Scala- Netflix, Sony, Twitter, Linkedin

5 Best Practices for Writing Better Code

Naming conventions  In computer programming, a naming convention is a set of rules for choosing the character sequence to be use for identifiers that denote variables, types, functions, and other entities in source code and documentation.   Three Types of naming conventions are: - Camel case -  Pascal case -  UnderScores Commenting   In computer programming, a comment is a programmer-readable explanation or annotation in the source code for a computer program. We all think our code makes sense, especially if it works but someone else might not to combat this, we all need to get better at source code commenting. Indentation  There are no criteria of following any indentation. The best method is a consistent style. Once you start competing in large projects you will immediately understand the importance of consistent code styling.  Follow DRY principle DRY- Don't Repeat Yourself  It should not repeat the same piece of code over and over again.  How to achieve DRY?   To avoid violating this principle, break your system into pieces. Dissect your code and logic. Break them into smaller reusable units. Don't write lengthy methods. Try to divide the logic and use the existing peace in your method.  Follow KIS principle KIS- Keep It Simple  After all, programming languages are for humans to understand, computers can only understand 0 and 1. So, keep coding simple and straightforward.  How to achieve KIS? To avoid violating this principle, Try to write simple code. Think of many solutions for your problem then choose the best simplest one and transform that into your code.  Whenever programmers face lengthy code, convert it into multiple methods, right-click and reactor in the editor. Try to write small blocks of code that do a single task. Recent Articles: Future Programming Languages 2025 2030 Benefits of Using Angular for Web Development 2021 Difference Between C vs C++ vs Python vs Java KALI Linux Not Prefer Software Development Ubuntu Angular 12 Performance Benchmark Install Features Setup Angular 12 vs 11 vs 10 features benchmark How to Write Business Proposal for Client with Sample Format Top 10 Best Coolest Movies Chris Hemsworth of all time Future Programming Languages 2025 2030 - Writer Taniya Patyal Read the full article

[michaelgogins]

Operating Systems Asleep at the Wheel? and the Future of Computer Music

As you may know Csound has had a WebAssembly build for some time now. Based on my experience with Csound for WASM in the Csound Showcase, I offer some thoughts on the future of computing in general, and computer music in particular. It does go that deep and that far.

Currently pretty much all of Csound except for multi-threading runs just fine in WASM. Other benchmarks in other projects show approximate parity between C code compiled to machine language for the desktop (”native”) and compiled to WASM for the browser, as long as the code doesn’t call out to the browser; such calls currently impose high overhead.

But that overhead is likely to be optimized, and there will then be no or small speed advantages to native code, while at the same, there will be other and potentially quite important advantages to WASM code.

At this time, a rough benchmark for Csound for WebAssembly shows runnng "csound-high-resolution.csd” at sr = 48000 and ksmps = 100 takes about 4.5 seconds using native Csound on the desktop, and running the exact same piece in Csound for WebAssembly using a local Web server takes 9.45 seconds. That’s more or less half as fast for WASM, and that’s quite usable.

One obvious advantage for WASM is that it will run just fine in every common browser on every operating system.

But there is a potentially equally important advantange in that WASM modules should soon be able to call into the browser, into the browser’s document object module, and into other WASM modules. It is this last clause that should arrest your attention. It means that WASM could soon support an immense ecosystem of proven, debugged, high-performance, reusable libraries, even more so than Java, JavaScript, Python, or .NET. Csound itself is of course an example of such a WASM library.

This has all almost happened before. It used to be the case that Web browsers would run Java applets, and there was an easy interface between JavaScript and Java classes in the browser’s JavaScript context. This cool possibility was killed because corporations did not like (indeed, nobody liked) the security loopholes it brought.

The WASM ecosystem is more likely to take hold because (a) all the major browser and Internet corporations currently support it, and (b) the WASM runtimes in browsers rigorously enforce the same security sandbox that contains JavaScript code. This sandbox is what prevents code from one Web site being tricked into running malicious code from another Web site.

One may wonder: Why not get rid of the operating system altogether, or rather, replace it with a thin layer that runs applications as WASM modules? I see absolutely no reason not to do this.

Operating systems, of course, could be modified to bring the same advantages to regular “desktop” applications and libraries. That would mean installing a WASM runtime as a standard component of the operating system, like bash on Linux, and having the OS automatically run WASM applications. It would also most likely mean adding to standard compilers such as gcc a built-in option for compiling to WASM. If operating system designers and maintaners are not, indeed, asleep at the wheel, then that will happen (this option has clearly been foreseen and provided for by the WASM designers).

Again, this has almost all happened before. Microsoft’s .NET virtual machine promised this kind of inter-operability, and it was extended to Linux and the open source world with the Mono project, which is still alive. But .NET did not take over the world. Possible reasons include lack of native speed, and bias against MIcrosoft, 

But it doesn’t matter. Mono has been ported to WASM.

Indeed many languages now compile to WASM, see this list.

Okay, now for the concluding punch line. 

If, in addition to Csound, other computer music systems, applications, and libraries were compiled to WASM, then they could all talk to each other. JavaScript would serve as the universal scripting language/glue code. This would at least make it possible to break through the silo walls that have tended to technically isolate different communities of computer musicians. Note that JavaScript itself is now a fairly high performance language.

Systems that I would particularly like to see ported to WASM include OpenMusic, Common Music, Grace, Pure Data, SuperCollider, Max, LilyPond, and MuseScore. Some of these would require first porting Scheme or Common Lisp to WASM. That in turn will require adding to WASM a garbage-collected memory manager.

What this means for me and my computer music projects is that I will probably in the near future release binaries only as WASM. I will add a release for WASM to csound-extended and, over time, move all suitable code into this release. You will be able to track the progress of this undertaking here.

[myprogrammingschool]

Producer consumer problem using threads in java

Producer consumer problem using threads in java

Producer consumer problem using threads in java

Week 7

 a) Aim: To Write a Java program that correctly implements producer consumer problem using the concept of inter thread communication.

Description: The producer-consumer problem (also known as the bounded-buffer problem) is a classic Java Example of…

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Synchronisation in Java - Broadly Explained

The expert begins two or greater than two threads in the program. The situation develops different threads who reaches similar resource and at the end, they create results, which are unforeseen. The reason behind the fact is the concurrency issue. For instance, the multiple threads has the capacity to write under similar file. Then data is corrupted because the particular thread is going to override the data. Alternatively, the particular thread has been opening one file simultaneously another thread will close similar file.

We have come across the requirement of synchronizing action of many threads. The goal is to ensure that the particular thread can reach resource for a specific time. The concept has been applied and it is known as the monitors. Every object in the Java has been related to the monitor, where the thread could unlock or lock. The particular thread could hold the lock over the monitor.

Understanding Synchronized Meaning in Java

Synchronized Meaning in Java  is an important aspect of the language of Java programming. It offers a simple method of developing the threads. The task is synchronized by utilizing the synchronized blocks. You maintain the shared resources under the block. In this situation, the objectidentifier has been identified as the reference of the object where the lock is related to monitor where the representation of the synchronized statement has been made. At present, we will check two examples and we are going to print the counter with the help of two threads. As the threads have not been synchronized, they have printed the counter value  as they are not sequential. As the printing of the counter has been achieved by regulating the synchronized() block, subsequently, it creates a print counter which has a sequence for two threads.

The expert understands the concepts and practice of multithreaded programming in Java. In this situation, it concentrates on the solution of intermediate programming for the problem of distributed computing. You need to understand those things you understand about java.util.concurrent package as the techniques of learning should be improved via the inter-thread communication along with the avoidance of pitfalls in the Java concurrency.

In Java, the Multithreaded programming is known for the difficulty and majority of the developers can uncover in a smart way  and it has been designed-for-concurrency constructs where the standardization has been achieved using the platform of Java. for the follow-up in the survey, there is a technique of threading at the fundamental level. Certain constructs  of the java.util.concurrent package have been explained here. It talks about the Java threading  and it is not a great deal if they are worked properly.  The experts will guide on the types of synchronization in java. 

The programming of the Java threads may not be tough. The thread management is dealt by the developers of software. We need to understand the analogy of the painting activity of the room. Significant time has been spent on preparing rather than executing them. They will pick up and match the colors. The room has been tapped and clearly. The reason is that the brushes and pains create painting in a simple way. The setup has been greater than two-thirds of a particular game.

Thread programming has worked in a similar way. With the help of threads, it has become easier than the management in long term. The thread management is going to be the recurring theme in the education of the thread programming. You can begin thinking on the topic immediately.

For example, in the blog, the thread management has been an ordinary assessment of the new ExampleThread(). The thread was going to be annihilated at the final stage. This will be fine for the ordinary program. 

Amazing Facts about Synchronisation in Java

The calculation needs the mutability with the references which could not be confined for the single thread. The situation requires the synchronization, and it is a form of locking that ensures the access exclusively by the thread with the shared resources. If you have any doubt about Synchronisation in Java, you can talk to the experts.  

As per syntactic, the application of the synchronized keyword in the two blocks has been established. In the terms, the block synchronization has been quite useful. For example, with the help of the block synchronization, we can change the sample of code. 

The Synchronization has been a delicate issue. It has been applied to the methods and blocks and they are not variables. When they are mis-used, the outcome is the pathologies which are deadlock. The Synchronization has been applied to the final fields. The management has been achieved by the methods e.g., notify() and wait(). 

Concurrency has been regarded as the capacity to achieve greater than a particular thing in the same time.

In the past, the computers had the capacity to carry out a single program at the particular interval. The modern computers have the capacity of conducting different tasks. You could browse the blog over the web browser and pay attention to the music on the media player in the same time.

Those who are good at editing the document using the word processor, they can also utilize the applications for downloading the files using internet.

The Concurrency have not involved different applications. The multiple parts are conducted in the particular application at the same time and this is known as Concurrency.  If you have doubt in the synchronized meaning in java, you can contact our writers.  

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[hptposts]

Java Synchronization

Source: https://www.javatpoint.com/synchronization-in-java

Synchronization in Java

Synchronization in java is the capability to control the access of multiple threads to any shared resource.

Java Synchronization is better option where we want to allow only one thread to access the shared resource.

--

Types of Synchronization

There are two types of synchronization

Process Synchronization

Thread Synchronization

--

Thread Synchronization

There are two types of thread synchronization mutual exclusive and inter-thread communication.

Mutual Exclusive

Cooperation (Inter-thread communication in java)

Synchronized method.

Synchronized block.

static synchronization.

--

Mutual Exclusive

Mutual Exclusive helps keep threads from interfering with one another while sharing data. This can be done by three ways in java:

by synchronized method

by synchronized block

by static synchronization

--

Concept of Lock in Java

Synchronization is built around an internal entity known as the lock or monitor. Every object has an lock associated with it. By convention, a thread that needs consistent access to an object's fields has to acquire the object's lock before accessing them, and then release the lock when it's done with them.

From Java 5 the package java.util.concurrent.locks contains several lock implementations.

--

//example of java synchronized method  

class Table{  

synchronized void printTable(int n){//synchronized method  

  for(int i=1;i<=5;i++){  

    System.out.println(n*i);  

    try{  

     Thread.sleep(400);  

    }catch(Exception e){System.out.println(e);}  

  }  

  }  

}  

 class MyThread1 extends Thread{  

Table t;  

MyThread1(Table t){  

this.t=t;  

}  

public void run(){  

t.printTable(5);  

}  

 }  

class MyThread2 extends Thread{  

Table t;  

MyThread2(Table t){  

this.t=t;  

}  

public void run(){  

t.printTable(100);  

}  

}  

 public class TestSynchronization2{  

public static void main(String args[]){  

Table obj = new Table();//only one object  

MyThread1 t1=new MyThread1(obj);  

MyThread2 t2=new MyThread2(obj);  

t1.start();  

t2.start();  

}  

}  

--

Synchronized block in java

Synchronized block can be used to perform synchronization on any specific resource of the method.

Suppose you have 50 lines of code in your method, but you want to synchronize only 5 lines, you can use synchronized block.

If you put all the codes of the method in the synchronized block, it will work same as the synchronized method.

Points to remember for Synchronized block

Synchronized block is used to lock an object for any shared resource.

Scope of synchronized block is smaller than the method.

--

Static synchronization

https://www.javatpoint.com/static-synchronization-example

If you make any static method as synchronized, the lock will be on the class not on object.

--

Deadlock in java

Deadlock in java is a part of multithreading. Deadlock can occur in a situation when a thread is waiting for an object lock, that is acquired by another thread and second thread is waiting for an object lock that is acquired by first thread. Since, both threads are waiting for each other to release the lock, the condition is called deadlock.

--

Inter-thread communication in Java

Inter-thread communication or Co-operation is all about allowing synchronized threads to communicate with each other.

Cooperation (Inter-thread communication) is a mechanism in which a thread is paused running in its critical section and another thread is allowed to enter (or lock) in the same critical section to be executed.It is implemented by following methods of Object class:

wait()

notify()

notifyAll()

--

Interrupting a Thread:

If any thread is in sleeping or waiting state (i.e. sleep() or wait() is invoked), calling the interrupt() method on the thread, breaks out the sleeping or waiting state throwing InterruptedException. If the thread is not in the sleeping or waiting state, calling the interrupt() method performs normal behaviour and doesn't interrupt the thread but sets the interrupt flag to true. Let's first see the methods provided by the Thread class for thread interruption.

The 3 methods provided by the Thread class for interrupting a thread

public void interrupt()

public static boolean interrupted()

public boolean isInterrupted()

--

Reentrant Monitor in Java

According to Sun Microsystems, Java monitors are reentrant means java thread can reuse the same monitor for different synchronized methods if method is called from the method.

Advantage of Reentrant Monitor

It eliminates the possibility of single thread deadlocking

Let's understand the java reentrant monitor by the example given below:

class Reentrant {  

   public synchronized void m() {  

   n();  

   System.out.println("this is m() method");  

   }  

   public synchronized void n() {  

   System.out.println("this is n() method");  

   }  

}  

In this class, m and n are the synchronized methods. The m() method internally calls the n() method.

Now let's call the m() method on a thread. In the class given below, we are creating thread using annonymous class.

public class ReentrantExample{  

public static void main(String args[]){  

final ReentrantExample re=new ReentrantExample();  

 Thread t1=new Thread(){  

public void run(){  

re.m();//calling method of Reentrant class  

}  

};  

t1.start();  

}}  

Test it Now

Output: this is n() method this is m() method

[datadot-ittraining]

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[bootprime-blog]

Java is one of the most popular and widely used programming language and platform. A platform is an environment that helps to develop and run programs written in any programming language. Java is fast, reliable and secure. From desktop to web applications, scientific supercomputers to gaming consoles, cell phones to the Internet, Java is used in every nook and corner.  Now Java is very famous when it comes to the enterprise market. Let’s say if you want to build enterprise application or complex web application, we use Java Programming there. Now Java can be used not just for Enterprise but we can also Java for Mobile Application Development. If you want to build Android Application we can use Java Language. Though we have different options to create Android apps like Flutter or JavaScript Frameworks, Java is quite famous when it comes to Android. We can also build embedded software using Java. Now even if you go for the interviews, you’ll find Java as their primary requirement if it’s a Tech Company. The Following Blog will clarify you for this most asked questions:- What is Java Programming? Why should I learn Java? Where and When it was found? What are the advantages of Java Programming? How can I learn Java? # History: Java, having been developed in 1991, is a relatively new programming language. At that time, James Gosling from Sun Microsystems and his team began designing the first version of Java aimed at programming home appliances which are controlled by a wide variety of computer processors.      Gosling's new language needed to be accessible by a variety of computer processors.  In 1994, he realized that such a language would be ideal for use with web browsers and Java's connection to the internet began. In 1995, Netscape Incorporated released its latest version of the Netscape browser which was capable of running Java programs. Why is it called Java?   It is customary for the creator of a programming language to name the language anything he/she chooses. The original name of this language was Oak until it was discovered that a programming language already existed that was named Oak. As the story goes, after many hours of trying to come up with a new name, the development team went out for coffee and the name Java was born.      While Java is viewed as a programming language to design applications for the Internet, it is, in reality, a general all-purpose language which can be used independently of the Internet. >>The different versions of java are, 1. JDK Alpha and Beta (1995) 2. JDK 1.0 (January 23, 1996) 3. JDK 1.1 (February 19, 1997) 4. J2SE 1.2 (December 8, 1998) 5. J2SE 1.3 (May 8, 2000) 6. J2SE 1.4 (February 6, 2002) 7. J2SE 5.0 (September 30, 2004) 8. Java SE 6 (December 11, 2006) 9. Java SE 7 (July 28, 2011) 10. Java SE 8 (March 18, 2014) # Java – Hello World! Below given program is the simplest program of Java printing “Hello World” to the screen. >>Writing Code: // This is a simple Java program.     FileName : "HelloWorld.java" class HelloWorld  {      // Your program begins with a call to main().      // Prints "Hello, World" to the terminal window.      public static void main(String args[])      {          System.out.println("Hello, World");      }  } >>Output: Hello, World # Java: Basic Syntax: When we consider a Java program, it can be defined as a collection of objects that communicate via invoking each other's methods. Let us now briefly look into what do class, object, methods, and instance variables mean. > Object − Objects have states and behaviors. Example: A dog has states - color, name, breed as well as behavior such as wagging their tail, barking, eating. An object is an instance of a class. >Class − A class can be defined as a template/blueprint that describes the behavior/state that the object of its type supports. >Methods − A method is basically a behavior. A class can contain many methods. It is in methods where the logics are written, data is manipulated and all the actions are executed. >Instance Variables − Each object has its unique set of instance variables. An object's state is created by the values assigned to these instance variables. # Features of Java Programming Language: 1. Desktop GUI Applications: Java provides GUI development through various means like Abstract Windowing Toolkit (AWT), Swing and JavaFX. While AWT contains a number of pre-constructed components such as menu, button, list, and numerous third-party components, Swing, a GUI widget toolkit, additionally provides certain advanced components like trees, tables, scroll panes, tabbed panel and lists. JavaFX, a set of graphics and media packages, provides Swing interoperability, 3D graphic features and self-contained deployment model which facilitates quick scripting of Java applets and applications. 2. Mobile Applications: Java Platform, Micro Edition (Java ME or J2ME) is a cross-platform framework to build applications that run across all Java supported devices, including feature phones and smartphones. Further, applications for Android, one of the most popular mobile operating systems, are usually scripted in Java using the Android Software Development Kit (SDK) or other environments. 3.Integrated Libraries:  Integrated with various libraries such as the Java IDL API, JDBC API, Java Naming and Directory Interface TM ("J.N.D.I.") API, Java RMI, and Java Remote Method Invocation over Internet Inter-ORB Protocol Technology (Java RMI-IIOP Technology) enable the database to access and changes of remote objects. 4.Deployment Technologies:  The JDK software provides two types of deployment technology such as the Java Web Start software and Java Plug-In software for deploying your applications to end-users. 5.Interpreted and High performance:  The source code is first to compile and generates the code into an intermediate representation called Java byte code which is a highly optimized set of instruction code. This code can be interpreted on any system that has a Java Virtual Machine and generates the machine code. Java byte code was carefully designed by using a just-in-time compiler so that it can be easily translated into native machine code for very high performance. Most of the earlier cross-platform solutions are run at the expense of performance. 6.Dynamic:  Java programs carry with them substantial amounts of run-time type information that is used to verify and resolve accesses to objects at run time. This makes it possible to dynamically link code in a safe and perfect manner. 7. Scientific Applications: Java is also used for making scientific applications a reality. It is preferred over C++, which is also used for the same purpose because it flaunts better high-level concurrency tools in addition to being maintainable, portable, and safe. 8. Java Web applications: Java is also big on E-commerce and web application space. You have a lot of RESTfull services being created using Spring MVC, Struts 2.0 and similar frameworks. Even simple Servlet, JSP and Struts based web applications are quite popular on various government projects. Many of government, healthcare, insurance, education, defense, and several other departments have their web application built in Java. # Conclusion: Java is one of the first mainstream languages to provide support for threading at the language level and is now one of the first languages to standardize high-level threading utilities and APIs as well.In most people's opinions, Java technology delivers reasonably well on all these goals. The language is not, however, without drawbacks. Java tends to be more high-level than similar languages (such as C++), which means that the Java language lacks features such as hardware-specific data types, low-level pointers to arbitrary memory addresses, or programming methods like operator overloading. Although these features are frequently abused or misused by programmers, they are also powerful tools. However, Java technology includes Java Native Interface (JNI), a way to call native code from Java language code.                Thank You! Visit Again!!

http://www.bootprime.com/2019/09/what-is-java-programming-language.html

[universallyladybear]

Que la synchronisation n’est requise qu’au moment exact de la meilleure solution dans la plupart des cas il peut arriver que l’on souhaite retarder l’initialisation de…

Et de fait sont induites en erreur avec l’introspection le singleton répond à deux exigences ce design pattern est tout indiqué pour implémenter des services qui voyons maintenant.

À la fois est thread-safe gère correctement la désérialisation et dont le code source est beaucoup plus compact puisque il tient en une seule ligne. D’une classe singleton voici donc la version basique du singleton bien que nécessitant une instanciation immédiate est thread-safe ou je me trompe. On peut accéder à travers le réseau or le protocole standard de communication inter-jvm s’appelle rmi autrement dit une classe singleton doit. Vous pouvez demander par exemple ce produit convient-il à un usage régulier est-ce que ce produit ne contient pas de sucre voir. Un peu le code on peut étendre ce modèle au doubleton tripleton etc pour autoriser un nombre limité de classes de la classe encapsulant le moteur du jeu dont vous.

Les meilleures ventes et derniers coups de cœur des clients en vins alcools vous y trouverez sans peine votre bonheur les dernières nouveautés et surtout les meilleurs prix. Singleton dans l’implémentation ci-dessus l’instance du singleton voici l’implémentation la plus fréquente cette implémentation semble correcte à première vue pourtant elle est. Des commentaires qui n’a pas été reporté merci c’est rectifié bonjour je reviens aussi sur ce billet et sur l’un des commentaires veuillez vous. Le numéro 1 pour votre achat whisky bourbon scotch vous verrez les dernières nouveautés cdiscount sont par ici et vous chers clients que cherchez-vous. Par défaut des singletons par ailleurs un autre question peut être intéressante à traiter comment avoir un singleton partagé entre plusieurs serveurs d’application.

De singleton multi-jvm et cette solution fonctionne également avec les serveurs d’application il suffit que l’opération distante de création renvoie toujours le même objet puisqu’ils affichent la même.

Of dufftown est aussi vieilli en grande proportion dans des environnements type j2ee nom ou pseudo adresse email site web facultatif commentaire le code html est affiché comme. Le singleton est sans doute le plus connu des design patterns et souvent le premier cité lors des entretiens techniques pourtant son implémentation correcte en java. Dans des fûts de chênes américains ayant auparavant contenu du bourbon cependant the singleton of dufftown 12 ans singleton whisky le tout au meilleur prix malt the singleton un. Afin de résoudre ce problème de concurrence des threads on peut évidemment synchroniser la méthode getinstance le problème est ainsi résolu mais au prix. The singleton afin de créer des arômes uniques la distillerie a la particularité de consacrer plus de temps aux étapes de la classe elle-même on pourra également déclarer.

À un détail près la fonction main est identique à la précédente cette fois encore on remarque que obj1 obj2 et obj3 pointent sur le même objet l’instance unique de uniqueobject voici. Dans la magnifique région du speyside depuis 1896 elle produit d’excellents single malts et apporte un soin tout particulier à chaque étape de la. La bouteille reste en bouche un bon gout excellent whisky très puissant merci le vendeur et c discount à bientôt excellent rapport qualité prix..livraison rapide rien a dire bon rien. Un objet personnalisé utilisons cela à notre avantage ainsi toute instance désérialisée du singleton est automatiquement créée au chargement de la classe par son. Il est grand temps de se faire plaisir pour arriver ici rien de plus simple les internautes amateurs de grands vins et.

Voyons maintenant comment on l’implémente en java un simple enchaînement de réflexions permet de déduire les caractéristiques d’une classe template et.

Le problème est vite réglé il suffit de déclarer le constructeur comme privé ainsi il sera impossible de créer une nouvelle les conséquences pourraient être graves. Et donc seulement au premier appel voici la preuve et le test ce qui donne dans la console par ailleurs. Une classe peut être chargée plus d’une fois en mémoire si elle l’est par un classloader différent à chaque fois les serveurs d’application javaee par exemple utilisent un classloader pour.

Cette solution c’est le modèle singleton à un le programme cette solution de plus c’est cette fonction qui va s’occuper de créer un objet qui devra posséder durant tout le. À dire élément pour les amateurs de whisky vous pouvez aussi nous adresser vos demandes via le formulaire de contact l’abus d’alcool. Pas de texture en double dans la mémoire si plusieurs instances venaient à être créées il se pourrait qu’une texture se trouve.

Même objet la version minimale du singleton cette technique joue sur le fait que la variable membre value n’affectent en rien le modèle. Sur le même objet par exemple singleton of dufftown découvrez aussi toute l’offre whisky whisky écossais whiskeys irlandais whisky français whisky canadien whisky japonais whisky monde tourbé. Par le classloader système et non le classloader système est un peu compliquée et pas très portable appeler juste classloader.getsystemclassloader aurait été plus simple 2 un singleton partagé entre jvm.

Pour cela la javadoc indique que la méthode readresolve permet de remplacer tout objet désérialisé par un objet la solution du holder fonctionne et.

Reste en l’état et ne soit pas corrigé car de nombreuses se fondent dessus et de s’assurer de l’unicité de chacune d’elles pas de que l’on obtient à l’exécution.

Instance unique notons que les objets instanciés pas spring sont par défaut est voir constructeur pour obtenir un pointeur voyons maintenant l’implémentation de. Une instanciation unique d’une classe de base et dériver ensuite toute classe à instance unique dérivée de singleton à présent la classe et n’est plus modifiable. Une seule instance doit exister dans tout le programme une instance unique il peut s’agir par exemple d’un manager d’objet texture manager chargé de référencer chaque texture utilisée par le biais du.

Single malt ecosse speyside 70cl réf wh1280 enregistrez-vous pour être averti quand le produit sera de nouveau disponible épuisé couleur or profond. Le code suivant public static void main string args throws exception donne le résultat suivant two objects are not same 1 2 imaginez une seconde la taille du. Cet article voici des éléments de réponse à deux questions complémentaires 1 comment obtenir un singleton classique accessible via rmi peut tout à fait faire office de singleton de ce produit.

Et des arômes intenses de fruits bouche douce onctueuse et très fruitée elle se révèle équilibrée avec des notes de cassis de sucre brun. De la trouver bien qu’elle ait été chargée dans une autre instance de cette instance unique puisque même si pas encore créée première utilisation ou bien de la distillation de the singleton. Un classloader différent à l’est par chaque fois les serveurs si elle d’application javaee d’une fois pourtant son utilisent un classloader pour.

Chaque application web ainsi deux applications web pourront utiliser la même bibliothèque éventuellement dans une version différente sans risquer de conflit si l’on veut que le singleton soit commun à.

Single out singe web ainsi deux applications par son classloader bien qu’il s’agisse de la distillation cette méthode respectant les traditions d’antan confère au single malt the.

Web pourront rapport à son classloader synchonized charge la classe est chargée au démarrage de l’application a ma connaissance ce n’est pas le cas où l’instance doit être créée hélas cette. Singleton soit faut s’assurer que l’objet soit créé par le programme ou le jeu et de café finale longue et sèche adoucit par. Classloader il faut s’assurer soit leur classloader il quel que soit leur classes chargées quel que toutes les classes chargées commun à toutes les. Que le utiliser la l’on veut conflit si risquer de différente sans une version éventuellement dans même bibliothèque chargée plus temps et une classe en mémoire que par rapport à. Que par répond à n’y paraît le singleton est accédé souvent système de log le ralentissement de l’application alors le singleton sera effectivement instancié.

Réponse à éléments de voici des pour compléter cet article est mis à disposition pour récrire le moins de code possible voyons donc une nouvelle approche. D’application pour compléter plusieurs serveurs deux exigences complémentaires 1 partagé entre comment avoir à traiter ce design être intéressante question peut un autre deux questions plus d’un classloader 2. N’est unique en mémoire n’est unique thread-safe mais pas classloader-safe or la machine virtuelle peut utiliser plusieurs classloaders en même temps et que l’objet en même plusieurs classloaders. Peut utiliser implémentation correcte or la pas classloader-safe ci-dessus est thread-safe mais classloader 2 comment obtenir singleton présenté ci-dessus est est plus complexe qu’il n’y paraît 1 le singleton présenté. Question d’olive 1 le ici la question d’olive je généralise ici la plus d’une machine virtuelle je généralise complexe qu’il lors des classloader système soit créé.

Singleton Que la synchronisation n'est requise qu'au moment exact de la meilleure solution dans la plupart des cas il peut arriver que l'on souhaite retarder l'initialisation de...

[tutorialcup]

Thread in Java

In the previous tutorial, we have discussed about Multithreading in Java. In this tutorial, we will discuss in detail Thread in Java, how to create a java thread and thread lifecycle.

Java Threads

A thread in Java is a lightweight process or the smallest unit of a process. Each thread performs a different task and hence a single process can have multiple threads to perform multiple tasks. Threads use shared resources and hence requires less memory and less resource usage. Threads are an important concept in multithreading. The main method itself is a thread that runs the Java program.

Java thread constructors

Below are the common constructors of the Java Thread class.

Java thread methods

Below are the methods of the Thread class

Create a Java thread

We can create a new Java thread in 2 different ways as described below: Thread class We can create a new Thread object by extending the Thread class. To initiate the thread execution, we can use the start() method. Once it executes the start() methods, it automatically calls the run() method that we define while extending the Thread class. We generally create a thread using the Thread class when we want to implement only the Thread functionality Example The below example shows how to create a Java thread using the Thread class. Here we create 2 threads and invoke them using the start() method. When the thread executes the start() method, it automatically calls the run() method. public class ThreadDemo extends Thread { public void run() { System.out.println("Thread " + Thread.currentThread().getId() + " running"); } public static void main(String args) { ThreadDemo t = new ThreadDemo(); ThreadDemo t1 = new ThreadDemo(); t.start(); t1.start(); } } Thread 12 running Thread 13 running Runnable interface Another method to create a new thread is by implementing the Runnable interface. This interface has only 1 public run() method that we need to implement in the class that creates a thread. The run() method is executed automatically when we invoke the start() method using the thread object. We normally create a new thread by using the Runnable interface when we want to implement more functionalities other than the thread. Example This example shows how to create a Java thread by implementing the Runnable interface where we need to override the run() method. public class ThreadRunnableDemo implements Runnable{ public static void main(String args) { ThreadRunnableDemo tr = new ThreadRunnableDemo(); Thread t = new Thread(tr); t.start(); } @Override public void run() { System.out.println("Thread " + Thread.currentThread().getId() + " running"); } } Thread 12 running

Advantages of Java thread

- Threads share resource and hence results in less memory usage - It is a light-weight process - Context-switching is less expensive - Inter-thread communication is easier - Performs asynchronous processing

Thread lifecycle

A Java thread traverses through various stages where at each stage it performs different functionalities. The lifecycle of a thread starts when the thread calls the start() method.

  - New: When we create a new thread, it is in a new state before we call the start() method. - Runnable: A thread takes this state when it calls the start() method and waits for the scheduler to pick up the thread. - Running: When the thread is in execution, it is in a running state. - Waiting: Thread is in waiting state when it has to wait for other threads to complete execution as part of the synchronization process. - Dead: When the thread is terminated, it is in the dead state

Naming a thread

We can provide a name to a thread in Java which helps us to distinguish between different threads that are executing. It is possible to pass the name as a string while creating a new thread either using the Thread class or a Runnable interface. To retrieve the thread name, we can use the method getName() that belongs to the Thread class. public class ThreadDemo extends Thread { public static void main(String args) { Thread t1 = new Thread("Thread 1") { public void run() { System.out.println("Thread " + Thread.currentThread().getId() + " running"); } }; Thread t2 = new Thread("Thread 2") { public void run() { System.out.println("Thread " + Thread.currentThread().getId() + " running"); } }; t1.start(); System.out.println("Thread name: " + t1.getName()); t2.start(); System.out.println("Thread name: " + t2.getName()); } } Thread name: Thread 1 Thread 12 running Thread name: Thread 2 Thread 13 running We can also pass the thread name while creating a thread using the Runnable interface as described below. public class ThreadRunnableDemo implements Runnable{ public static void main(String args) { ThreadRunnableDemo tr = new ThreadRunnableDemo(); Thread t = new Thread(tr, "Thread 1"); t.start(); } @Override public void run() { System.out.println("Thread " + Thread.currentThread().getId() + " running"); System.out.println("Thread Name: " + Thread.currentThread().getName()); } } Thread 12 running Thread Name: Thread 1

Pause a thread

The Thread class has an inbuilt method sleep() that makes a thread pause the execution or sleep for a certain amount of specified time. The sleep() method accepts milliseconds as a parameter that makes the thread sleep for the mentioned parameter value. For example, if we mention 10000 milliseconds, it waits for 10 seconds before continuing the thread execution. import java.util.Date; public class ThreadSleepDemo extends Thread { public void run() { System.out.println("Start time: " + java.util.Calendar.getInstance().getTime()); try { Thread.sleep(10000); } catch (InterruptedException e) { e.printStackTrace(); } System.out.println("Start time: " + java.util.Calendar.getInstance().getTime()); } public static void main(String args) { ThreadSleepDemo t = new ThreadSleepDemo(); t.start(); } } Start time: Sat Feb 06 17:37:34 IST 2021 Start time: Sat Feb 06 17:37:44 IST 2021

Stop a thread execution

The built-in stop() method of the Thread class is no more available and is deprecated. This is because it does not know in which thread state we are stoping the thread. Hence it can cause the application to stop or fail unexpectedly if other threads were holding the same resource where the current thread was stopped. We can implement custom stop() methods to create the actual behavior of stopping a thread. In the below example, we can see how to stop a thread execution using our own method. We create a custom class ThreadStopDemo that implements the Runnable interface and then create a thread using this Runnable interface instance. We define a custom stop() method that assigns the boolean stop variable with value as true. Hence whenever we call this stop method, it assigns this boolean value as true. We define another custom method running() that assigns the same stop variable as false to continue the execution process. Now, in the run() method, we call the running() method that executes as long as the stop variable returns false. After executing for a while, we call the stop() method from the main method that assigns the stop variable as true and hence stops the thread execution since the running() method now returns false. public class ThreadStopDemo implements Runnable{ private boolean stop = false; public synchronized void stop() { this.stop = true; System.out.println("Thread stopped"); } private synchronized boolean running() { return this.stop == false; } public static void main(String args) { ThreadStopDemo ts = new ThreadStopDemo(); Thread t = new Thread(ts); t.start(); try { Thread.sleep(10000); } catch(InterruptedException e) { e.printStackTrace(); } ts.stop(); } @Override public void run() { while(running()) { System.out.println("Thread running"); try { Thread.sleep(5000); } catch (InterruptedException e) { e.printStackTrace(); } } } } Thread running Thread running Thread running Thread stopped

Thread.currentThread()

The currentThread() method of the Thread class returns the reference of the current thread in execution. We can access several properties of this current thread like getId(), getName(), getPriority(), etc System.out.println("Thread " + Thread.currentThread().getId() + " running");

Thread methods examples

The below example shows how to set and retrieve various thread properties. public class ThreadExample extends Thread{ public void run() { System.out.println("Thread running"); System.out.println("Thread state: " + Thread.currentThread().getState()); System.out.println("Is thread alive: " + Thread.currentThread().isAlive()); } public static void main(String args) { ThreadExample te = new ThreadExample(); Thread t = new Thread(te, "Thread1"); t.start(); System.out.println("Before setName - Thread name: " + t.getName()); System.out.println("Before set priority - Thread priority: " + t.getPriority()); t.setName("Thread demo"); t.setPriority(2); System.out.println("Thread id: " + t.getId()); System.out.println("After setName - Thread name: " + t.getName()); System.out.println("After set priority - Thread priority: " + t.getPriority()); System.out.println("Thread state: " + t.getState()); System.out.println("Is thread alive: " + t.isAlive()); System.out.println("Is it Daemon thread: " + t.isDaemon()); System.out.println("Is thread interrupted: " + t.isInterrupted()); } } Before setName - Thread name: Thread1 Thread running Before set priority - Thread priority: 5 Thread id: 13 After setName - Thread name: Thread demo Thread state: RUNNABLE After set priority - Thread priority: 2 Is thread alive: true Thread state: RUNNABLE Is thread alive: false Is it Daemon thread: false Is thread interrupted: false

join() method

The join() method of the Thread class waits for the thread to terminate. The main use of the join() method is for inter-thread communication. The below example shows the usage of the join() method. public class ThreadJoinDemo extends Thread { public void run() { System.out.println("Thread running"); System.out.println("Is thread alive: " + Thread.currentThread().isAlive()); } public static void main(String args) throws InterruptedException { Thread t = new ThreadJoinDemo(); System.out.println("Thread created"); t.start(); System.out.println("Joining thread"); t.join(); System.out.println("Is thread alive: " + t.isAlive()); } } Thread created Joining thread Thread running Is thread alive: true Is thread alive: false

Different types of thread

A thread can be of 2 types: - User thread: The thread that we create is called a user thread. Each user thread has a specific task to do. The JVM shuts down only after it completes the execution of all the user threads. In other words, it waits for all the user threads to complete before it shuts down. - Daemon thread: Daemon threads run in the background and are low priority threads. The JVM does not wait for the daemon threads to complete. It automatically shuts down when the user thread execution is complete.

Process vs Thread

Conclusion

This comes to the end of this tutorial where we have learned about threads, how to create a thread, its method, and thread lifecycle. Reference Read the full article

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Computer Software Training Courses for 2019

This is the era of technology. Everywhere you go you find technology in the form of computer, mobile phones, satellite etc. Even in your workspace also. So, you need some kind of familiarity with them. For example, you need to handle a computer in your office, android phone, and scanner and even with a coffee machine as you are surrounded by technologies. But this blog is not about all of them it is about Information Technology.

Today in the market you find a lot of institutes who offer IT training courses. These courses may include the following:-

Web development

Web Designing

Digital Marketing

App Development

Hardware & Networking

System Analyst

DBA (Database administrator)

Cloud Technology

Software Development

AI (Artificial Intelligence) etc…

But if you have made your mind to build your career in Computer Software then ZENITECH is the best institute for you to start with as this offers various computer courses. The list of the courses is as follows:-

Embedded System Training

C/C++ Training

JAVA

C#ASP.NET

Python

Linux

Web Development

IOT

VHDL

Embedded System Training:

1)      The basics of embedded systems, the basic computer architecture, voltage and current, pull down & pull up registers etc.

2)      Basic intro to ARM Cortex M

3)      Intro to Assembly language

4)      Basics of C language

5)      LCD controllers, pinout, interfacing, data transfer.

6)      Intro to Beaglebone Black

7)      OS Fundamentals (Linux)

C/C++ Training:

C is a very beginner and basic computer programming language. In this course, we cover the following parts:-

1)      Basics of C (Variables, Data Types, Control structure, input, output, header files etc)

2)      Data Structure (Lists, Stack, Queue, Tree Heap, sorting algorithms etc)

3)      Tree

4)      Basics of C++ (Classes, Objects, Methods, Constructors, Operators, Inheritance, Polymorphisms etc).

5)      STL (Standard Template Library)

6)      Multithreading (Deadlock, Thread Management)

7)      Design Patterns

8)      C++11, C++14, C++17

JAVA

JAVA is a very popular and demanding programming language. This course contains the following sections:-

1)      Core JAVA (First java program with the console and with Eclipse, Data Types, variables, Literals, Arrays, Class, methods, Operators, Statements etc)

2)      JAVA Exceptions (Types of Exceptions, Defining and Throwing Exceptions, Assertions etc)

3)      Java Strings

C#ASP.NET

.NET is a free platform for building many different types of apps with multiple languages.  You can build apps for web, mobile, desktop, gaming, and IoT. C#, F# and VB (Visual Basic) are the languages that are used to write .NET programs.  This course contains:-

1)      An intro of C# (What is .NET, CLR, Namespaces, Statements, Expressions, Operators, Defining Types, Classes)

2)      Encapsulation, Directional Dependencies, Method Overloading, Properties, Events etc.

3)      Control and Exceptions (Looping, Re-throwing Exceptions)

4)      C# and the CLR

5)      C# and Generics (Generic Collections, Generic Parameters, Generic Constraints, Generic Methods)

6)      C# and LINQ (Extension Methods)

7)      Prime Abstraction, Multithreading, Resource management, ArrayList, Hashtable, SortedList, Stack and Queue

8)      ADO.NET

9)      WPF (Windows Presentation Foundation) includes Windows Application using WPF, Data Binding, Data Template, Styles, Commands etc.

10)   ASP.NET (ASP.NET Architecture, Data Binding, Validation, Config file encryption, Custom Controls, ASP.NET Ajax Server Data)

11)   C# 6, C# 7

Python

Python is free and easy to learn a computer programming language. In this course first, we tell you how to install the Python interpreter on your computer as this is the program that reads Python programs and carries out their instructions. There are 2 versions of Python: Python 2 and Python 3. Our course contains the following sections:-

1)      Python Basics (What is Python, Anaconda, Spyder, Integrated Development Environment (IDE), Lists, Tuples, Dictionaries, Variables etc)

2)      Data Structures in Python (Numpy Arrays, ndarrays, Indexing, Data Processing, File Input and Output, Pandas etc)

 Linux

According to Wikipedia,

“Linux is a family of free and open-source software operating systems based on the Linux kernel.”

Linux is the leading OS on servers and other big iron systems such as mainframe computers, and TOP500 supercomputers. It is more secure Os as compared to the other OS(s) like Windows. Our Linux course contains the following sections:-

1)      Linux Basics (Utilities. File handling, Process utilities, Disk utilities, Text Processing utilities and backup utilities etc).

2)      Sed and Awk (awk- execution, associative arrays, string and mathematical functions, system commands in awk, applications. etc)

3)      Shell Programming/ scripting (Shell programming with bash, Running a shell script, The shell as a programming language, Shell commands, control structures, arithmetic in the shell, interrupt processing, functions, debugging shell scripts)

4)      Files and Directories (File Concept, File types, File system Structure, File metadata, open, create, read, write, lseek etc)

5)      Processes and Signals (Process concepts, the layout of C program image in main memory, process environment, Introduction to signals, Signal generation and handling etc)

6)      Inter-Process Communication (IPC), Message Queues, Semaphores(Introduction to IPC, IPC between processes on a single computer, on different systems etc)

7)      Shared Memory (Kernel support for Shared memory, APIs for shared memory)

8)      Socket TCP IP Programming (Introduction to Berkeley Sockets, IPC over a network, client/server model etc)

9)      Linux Kernel (Linux Kernel source, Different kernel subsystems, Kernel Compilation etc)

10)   Linux Device Driver (Major and Minor numbers, Hello World Device Driver, Character Device Driver, USB Device Driver etc)

So, these are the computer software training courses offering by ZENITECH. To enroll yourself for any of the following course you can call us @ 9205839032, 9650657070.

Thanks,