#java super keyword

[java-highlight]

Danh Sách Từ Khóa Trong Java | Giải Thích Chi Tiết

Java là một trong những ngôn ngữ lập trình phổ biến nhất trên thế giới, được sử dụng rộng rãi trong phát triển ứng dụng, website, và hệ thống phần mềm. Một phần quan trọng làm nên sức mạnh của Java chính là từ khóa (keywords) – những từ được định nghĩa sẵn trong ngôn ngữ này, mang ý nghĩa đặc biệt và không thể sử dụng cho các mục đích khác như đặt tên biến hay hàm. Trong bài viết này, chúng ta sẽ khám phá danh sách từ khóa trong Java, ý nghĩa của chúng, và cách sử dụng hiệu quả. 

Từ Khóa Trong Java Là Gì?

Từ khóa trong Java là những từ được ngôn ngữ lập trình này quy định, có vai trò xác định cấu trúc và chức năng của mã nguồn. Những từ này không thể được sử dụng để đặt tên cho biến, lớp, phương thức, hay đối tượng. Từ khóa được chia thành nhiều nhóm dựa trên chức năng của chúng, bao gồm kiểu dữ liệu, điều khiển luồng, sửa đổi truy cập, xử lý ngoại lệ, và các mục đích đặc biệt khác.

Hiện tại, Java có tổng cộng 50 từ khóa được sử dụng phổ biến, cùng với một số từ khóa dự phòng (như const và goto) không được dùng trong thực tế. Dưới đây, chúng ta sẽ đi qua từng nhóm từ khóa chính và giải thích chi tiết.

Danh Sách Từ Khóa Trong Java Theo Nhóm

1. Từ Khóa Kiểu Dữ Liệu (Primitive Data Types)

Những từ khóa này xác định các kiểu dữ liệu cơ bản trong Java:

byte: Kiểu dữ liệu số nguyên 8-bit, giá trị từ -128 đến 127.

short: Kiểu dữ liệu số nguyên 16-bit, giá trị từ -32,768 đến 32,767.

int: Kiểu dữ liệu số nguyên 32-bit, phổ biến nhất, giá trị từ -2^31 đến 2^31-1.

long: Kiểu dữ liệu số nguyên 64-bit, dùng cho các số lớn.

float: Kiểu dữ liệu số thực 32-bit, dùng cho số thập phân.

double: Kiểu dữ liệu số thực 64-bit, chính xác hơn float.

boolean: Kiểu dữ liệu logic, chỉ nhận giá trị true hoặc false.

char: Kiểu dữ liệu ký tự 16-bit, biểu diễn ký tự Unicode.

Ảnh mô tả hệ thống các kiểu dữ liệu trong Java.

2. Từ Khóa Điều Khiển Luồng (Control Flow)

Những từ khóa này kiểm soát luồng thực thi của chương trình:

if: Kiểm tra điều kiện, thực thi khối lệnh nếu điều kiện đúng.

else: Thực thi khối lệnh khi điều kiện trong if sai.

switch, case, default: Dùng để xử lý nhiều nhánh điều kiện dựa trên giá trị của một biến.

for: Vòng lặp với số lần lặp xác định.

while: Vòng lặp chạy khi điều kiện đúng.

do: Thực thi ít nhất một lần trước khi kiểm tra điều kiện trong while.

break: Thoát khỏi vòng lặp hoặc switch.

continue: Bỏ qua phần còn lại của vòng lặp và chuyển sang lần lặp tiếp theo.

return: Trả về giá trị từ một phương thức.

Ảnh mô tả cách xử lí điều kiện và thực thi khối lệnh của câu lệnh điều kiện.

3. Từ Khóa Sửa Đổi Truy Cập (Access Modifiers)

Những từ khóa này kiểm soát phạm vi truy cập của lớp, phương thức, hoặc biến:

public: Thành phần có thể truy cập từ mọi nơi.

protected: Thành phần chỉ truy cập được trong cùng package hoặc lớp con.

private: Thành phần chỉ truy cập được trong cùng một lớp.

default (không khai báo rõ ràng): Phạm vi truy cập gói (package-private).

Ảnh mô tả các bộ điều chỉnh (Modifier) trong java.

4. Từ Khóa Xử Lý Ngoại Lệ (Exception Handling)

Những từ khóa này dùng để quản lý lỗi trong chương trình:

try: Khối lệnh chứa mã có thể gây ra ngoại lệ.

catch: Xử lý ngoại lệ được ném ra từ khối try.

finally: Khối lệnh luôn được thực thi, bất kể có ngoại lệ hay không.

throw: Ném một ngoại lệ cụ thể.

throws: Khai báo phương thức có thể ném ngoại lệ.

Ảnh mô tả hoạt động của nhiều khối catch.

5. Từ Khóa Liên Quan Đến Lớp Và Đối Tượng

Những từ khóa này liên quan đến lập trình hướng đối tượng trong Java:

class: Định nghĩa một lớp.

interface: Định nghĩa một giao diện (interface).

extends: Kế thừa một lớp cha.

implements: Thực thi một giao diện.

new: Tạo một đối tượng mới.

this: Tham chiếu đến đối tượng hiện tại.

super: Tham chiếu đến lớp cha hoặc gọi hàm khởi tạo của lớp cha.

instanceof: Kiểm tra một đối tượng có thuộc một lớp cụ thể hay không.

Ảnh mô tả đa kế thừa trong interface.

6. Từ Khóa Khác

Một số từ khóa quan trọng khác bao gồm:

static: Xác định thuộc tính hoặc phương thức thuộc về lớp, không cần tạo đối tượng.

final: Ngăn chặn việc sửa đổi (biến, phương thức, hoặc lớp).

abstract: Định nghĩa lớp hoặc phương thức trừu tượng.

synchronized: Đồng bộ hóa luồng để tránh xung đột.

volatile: Đảm bảo biến được đọc/ghi trực tiếp từ bộ nhớ chính.

transient: Ngăn chặn biến được tuần tự hóa.

native: Phương thức được triển khai bằng ngôn ngữ khác (như C/C++).

strictfp: Đảm bảo tính chính xác của phép toán dấu phẩy động.

assert: Kiểm tra điều kiện trong quá trình phát triển.

Từ Khóa Dự Phòng Trong Java

Ngoài 50 từ khóa chính, Java còn có hai từ khóa dự phòng: const và goto. Những từ này được giữ lại để đảm bảo tương thích với các ngôn ngữ khác (như C/C++), nhưng không được sử dụng trong thực tế. Nếu bạn cố gắng dùng chúng, trình biên dịch sẽ báo lỗi.

Lưu Ý Khi Sử Dụng Từ Khóa Trong Java

Không dùng từ khóa làm tên biến hoặc hàm: Vì chúng là từ khóa dành sẵn, việc sử dụng sai sẽ gây lỗi biên dịch.

Phân biệt chữ hoa/thường: Java phân biệt chữ hoa/thường, ví dụ Int không phải là từ khóa mà chỉ là tên biến hợp lệ.

Hiểu rõ ngữ cảnh sử dụng: Mỗi từ khóa có mục đích cụ thể, sử dụng sai có thể dẫn đến lỗi logic trong chương trình.

Kết Luận

Hiểu rõ danh sách từ khóa trong Java là bước đầu tiên để làm chủ ngôn ngữ lập trình này. Từ các kiểu dữ liệu như int, double, đến các từ khóa điều khiển luồng như if, for, hay xử lý ngoại lệ như try, catch, mỗi từ khóa đều đóng vai trò quan trọng trong việc xây dựng mã nguồn hiệu quả. Hy vọng bài viết này đã cung cấp cái nhìn toàn diện và chi tiết về từ khóa trong Java, giúp bạn học tập và ứng dụng tốt hơn.

Nếu bạn đang tìm kiếm tài liệu học Java hoặc cần ví dụ cụ thể về cách sử dụng từ khóa, hãy để lại câu hỏi để được hỗ trợ!

Danh sách từ khóa Java – Cẩm nang lập trình viên cần biết.

Tìm hiểu toàn bộ từ khóa trong Java – Giải thích chi tiết từng keyword, công dụng và cách sử dụng trong lập trình.

🌐 Website: Java Highlight

[learnerworld]

🧠Imagine you're at an all-you-can-eat buffet 🍽️. Instead of filling your plate with everything at once, you take one item at a time, savoring it, and going back for more only when you're ready.

📌This is exactly how generators work in Python—they serve you data on-demand, making them super efficient and memory-friendly.

A generator is like a "lazy chef" in your code. Instead of preparing an entire feast (dataset) in one go, it cooks and serves one dish (data item) at a time, only when you ask for it. This is done using the yield keyword in Python.

E.g.,

def lazy_numbers():

    for i in range(1, 4):

        yield i  # Produces one number at a time

gen = lazy_numbers()

print(next(gen))  # 1

print(next(gen))  # 2

print(next(gen))  # 3

🔍Notice how the generator "pauses" after each yield and resumes from where it left off.

Why Use Generators ❓

1️⃣ Memory Efficiency:

Instead of loading the entire dataset into memory (like a list), a generator produces data on-the-fly. E.g., Processing a 1GB file line by line without consuming 1GB of memory.

2️⃣ Faster Execution:

Generators produce data as needed, so you save time by not creating unnecessary items upfront.

3️⃣ Simpler Code:

They reduce boilerplate and make code cleaner when dealing with streams of data.

4️⃣ Infinite Data Streams:

You can generate an infinite sequence without worrying about memory constraints.

E.g., Scenarios like generating IDs, timestamps, or test data.

🚀Why Python Outshines Other Languages ❓

👉Ease of Use: Python's yield keyword is intuitive and concise. Languages like Java require more boilerplate code to achieve similar behavior.

👉Versatility: Generators integrate seamlessly with Python's rich ecosystem (e.g., itertools, comprehension-like syntax).

👉Community: Python’s focus on readability and simplicity makes generators accessible even to beginners.

Generators are your secret weapon for writing clean, efficient, and scalable code.

Have you used generators before? What’s your favorite use case? Let’s chat in the comments! 😊

[hcer]

(user430580) @OakBot Please tell me all the keywords of the Java language.

(OakBot) :66365448 Sure! Here are the keywords defined in the Java programming language:

abstract continue for new switch assert default goto package synchronized boolean do if private this break double implements protected throw byte else import public throws case enum instanceof return transient catch extends int short try char final interface static void class finally long strictfp volatile const float native super while

These keywords are reserved and have special meanings in the Java language, which you cannot use as identifiers (like variable names, class names, etc.). Happy coding!

public void throws if throw new try if else do return true

catch this class int while float short enum interface instanceof import

abstract package with byte sealed exports private for null yield

switch case break when default var permits double final char

strictfp const synchronized static volatile provides

transitive record extends transient requires opens

boolean assert goto implements long continue

super native, finally, protected; these words are key

fix'd

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The automation tester course covers the fundamental skills and knowledge in Australia for learning Automation Testing in Java. It lays a solid foundation to develop skills and knowledge required in Software Testing.

This Automation Testing Software Testing Course covers different areas of automation testing by building fundamental knowledge. Topics covered include Java installation, Java editor tools, Executable program in Java, Strings and variables, Using methods, Classes and objects in Java, Objects in Java, Calendar class, Constructors, Parameterized constructors, Super keyword, Collections framework, The List collection, ArrayList class, ArrayList, Set collection, Iterator, Accessing objects and more.

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Vererbung in Java

Vererbung in Java und das super-Keyword Einführung Vererbung ist ein zentrales Konzept in der objektorientierten Programmierung, das es ermöglicht, eine neue Klasse zu erstellen, die die Eigenschaften und das Verhalten einer bestehenden Klasse übernimmt. In Java ermöglicht die Vererbung die Wiederverwendung von Code, was die Entwicklung von Anwendungen effizienter und strukturierter macht. Das…

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How Social Media Helps Marketing Recruitment Firms to Boost Recruitment Efforts

Can you remember that time when you spent weeks sifting through stacks of resumes, desperately hoping to find that perfect candidate? Yes, the one with all the right skills, experience, and that spark that sets them apart from the crowd? Well, we’ve all been there!

The hunt for top talent feels more like a battle royale of those fierce competitors, doesn’t it? Everyone is competing for those super employees! But guess what? We have a secret weapon for you that will change the whole recruitment game for you! Social Media!

No, this isn’t some joke! Social media isn’t just for some cat videos and vacation pictures anymore. It has become a lot more like marketing solutions for recruiters who are looking to expand their reach, showcase their amazing company culture and connect with those exclusive A-players.

In this blog, we will dive into how social media is transforming the marketing recruitment firms landscape. We’ll look at how you can build your brand and zero in on those candidates, plus create a community alongside all this that will line those candidates to join your team. So, buckle up! And get prepared to discover how social media can supercharge your recruitment efforts!

Why Does Employer Branding Matter?

We know that all those A players have a ton of choices in today’s world. They are not just looking for a job, they want a place where they feel like they belong, A place where they can grow and thrive. Your social media is the perfect place to show them why your company is ‘that’ place. So, what should you share?

LinkedIn: This is more of your professional stage. Here, share your company updates, employee spotlights, and thought leadership articles. Show yourself as the industry expert.

Facebook & Instagram: Well, these are more of a personal and casual space. Share photos of your team outings, office celebrations, or even those silly BTS moments. Let people see the real culture of your company.

X (Twitter): This is where you can show off your company’s personality. Share industry news with a witty comment or engage in conversations with potential candidates.

The goal? Make people think, “Wow, this company seems awesome! I want to be a part of that.” That’s the magic of employer branding on social media.

Finding Your Perfect Fit with Social Media Ads

Ever come across an ad for that exact thing that you were just thinking or talking about? Well, that’s the magic of social media advertising, and recruiters are tapping into it like ‘big-time’. Social media lets you create ads that only show up to the people who are likely to be your ideal candidates.

This means you can pinpoint folks based on:

Demographics: Age, location, education level — anything, just name it.

Interests: Maybe they follow certain companies or groups related to your industry.

Skills: You can even target those keywords in their profiles, like “Java developer” or “marketing master.”

Job Titles: If they already have a similar role, they might be ready for a change.

By sponsoring your job postings or creating eye-catching content, you will reach more people than you could ever through traditional methods! It’s like having a big megaphone that only broadcasts to the people who actually want to hear your messages.

So, don’t just post and pray! Use social media’s advertising tools as marketing recruitment firms solutions to connect with the right people, and watch your recruitment efforts soar!

Opening the Doors to Real Conversations

Do you know the beauty of social media? It’s a two-way street! Recruiters aren’t just shouting about the job openings into some endless void, but they are chatting directly with candidates who are interested, answering questions about the company or diving deep into what the job role actually entails. You can also consider this as a virtual coffee date! But without those awkward small talks.

But hold up, there is more! Conduct live Q&A sessions, webinars, and even some virtual career fairs. Think of all of these as some giant networking event, but you can attend these in your PJs! How great is that? These events give you more chances to get a potential hire for your company.

Bottom line? Recruiters can use social media to share company updates, success stories, and industry insights, all while building genuine connections with potential hires. It’s about showing off what makes the company a great place to work and finding the right people to join the team.

Your People Are Your Best Cheerleaders

Think of your employees like built-in marketing solutions. They know your company inside and out, and when they’re genuinely enthusiastic, it shows!

When they share company updates, job openings, or even just fun office moments on their own social media, it’s like a personal recommendation from a friend. That kind of authenticity is marketing gold.

Your employees are like your in-built fan club! They know your company inside-out, and when they are genuinely enthusiastic, it shows! So, when they share your company updates, job openings, or even just fun office moments on their own social media, It’s great (It’s like getting a personal recommendation from a friend.) So it’s gold!

Why Employee Advocacy Works

Huge Reach: Your employees have extensive networks you can’t even imagine. Their posts reach friends, family, and even former colleagues- people who might be the perfect fit for your open roles.

Trust Factor: People trust recommendations from people they know way more than ads. Employee posts feel more genuine, not just sales-y.

Builds Your Brand: When your team is proudly sharing company stuff, it paints a picture of a great place to work. That attracts top talent.

How to Make It Happen

Creating an employee advocacy program doesn’t have to be complicated:

Make it Easy: Give your team ready-to-share content (Something like eye-catching images and pre-written captions, anything).

Incentivise: Offer referral rewards for participation (gift cards, extra time off).

Celebrate: Highlight employee posts that get great engagement to encourage others.

Keep it Real: Encourage employees to share their own experiences, not just company-approved lines.

Remember, the goal is to empower your team to be authentic advocates, not turn them into robots. When done right, employee advocacy can supercharge your recruitment efforts like nothing else.

Wrapping it up…

Phew! Look at the number of things we have covered! From showcasing your awesome company culture on Instagram to targeting the perfect candidate with LinkedIn ads, it is all clear that social media is a recruitment powerhouse.

If you are still not already tapping into these platforms, you’re missing out on a goldmine of talent. So, what is still stopping you? Dust off that old X (Twitter) account, spice up your LinkedIn profile, and start building those genuine connections. Remember, it is not just posting ads; it’s about telling your company’s story and showing off yourself to the world!

And hey, the future of social media recruitment is looking brighter than ever. With AI tools making it easier to find the right candidates and video resumes adding a personal touch, who knows what innovative strategies will emerge? It’s an exciting time to be in recruitment, so embrace the possibilities, experiment, and keep learning!

[kumarom]

Super Keyword in Java

The super keyword in Java is a reference variable which is used to refer immediate parent class object.

Whenever you create the instance of subclass, an instance of parent class is created implicitly which is referred by super reference variable.

Usage of Java super Keyword

super can be used to refer immediate parent class instance variable.

super can be used to invoke immediate parent class method.

super() can be used to invoke immediate parent class constructor.

[itsbeyondsimple-blog]

Check out this link to get more information about java boxing and unboxing. Stay Tuned to get in touch with us.

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[techtravelhub]

Java defines a special keyword called super for use in the definition of instance methods.The keyword super is for use in subclass.Super refers to the object that contains the method.It also remembers that it belongs to the super class of that class.

[eiraanwen]

Best WordPress Plugins Essential for Professional

WordPress is one of the best CMS platform for any kind of business. There are more than Fifty thousands of plugins available on WordPress. Therefore, it's quite difficult to choose which plugin is the best for your website.

It doesn't matter what kind of website you’re running, there are many useful plugins available that will help to boost your website performance and help to optimise your website.

So let's take a look at the list of best WordPress plugins essential for professional.

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Yoast very popular and No 1 SEO WordPress plugin. It is widely popular because it is easy to use and guides users through the step-by-step process of optimizing their website content. It can even analyze your content’s readability.

From optimizing your titles and heading tags, making sure your target keywords are accurate and increasing the overall readability of your content. Out of all the WordPress SEO plugins, Yoast offers the most comprehensive solution to improve your on-page SEO.

Yoast SEO is packed full of features, designed to help visitors and search engines to get the most out of your website .Yoast helps you add meta tags, generate sitemaps, connect your website to Google Search Console, Analytics and also optimize it for social media.

Since 2008 Yoast SEO has helped millions of websites worldwide to rank higher in search engines.

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WP Rocket is the best WordPress caching plugin on the market that helps you to speed up your website's loading time and performance. It automatically turns on gzip compression, page cache, and cache pre-loading.

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The most amazing feature of this plugin is it automatically crawls and build your website cache which results in an instant performance boost. For image optimisation, it offers Imagify which is a free. This service will help to speed up your website.

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WP Super Cache creates static HTML files from your dynamic WordPress site, which are lighter and quicker to process than PHP scripts. The web server uses these HTML files that will help your website load quickly and smoothly.

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Security should be a top priority for all the online businesses. Sucuri is the best WordPress security plugin. If you don’t have a firewall on your website, then you need to add one today because nowadays, hackers can attack on your website through any platform.

Therefore, they monitor and protect your website from DDoS, malware threats, XSS attacks, brute force attacks, and basically every other type of attack. Sucuri block hundreds of thousands of attacks every month on Verz Design & Gotafflair.

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It is also super easy to restore your website from a backup. Their base plugin is free. For the extra features & priority support they also have a paid plan.

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Beaver Builder is a drag and drop page builder that works on the front end of your WordPress website. You can easily build beautiful, responsive WordPress pages in minutes. Without writing single line code, It allows you to customise your web design and create custom page layouts.

Without hiring any web developer, business owners can still create completely custom landing pages within minutes. That’s the reason this plugin is very popular.

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7) Blog Filter - For filter blogs or posts

Blog Filter WordPress Plugin for Blogs or Posts filtering and for showing the blogs and posts in the grid layout to make a blog portfolio showcase. Blog Filter WordPress Plugin main features are posts filtering, category filtering, post grid, and columns layout, responsive, masonry design, show tags, blog author details, two design templates, post meta positioning and hide show, light and dark theme, hover color, five images hover effects, post read more link and more features. Plugin really useful to those blogger who has many blog subscribers and readers and potential visitors traffic on their blog websites.

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Conclusion

These plugins are essentials & more than just great additions to your WordPress website. No matter what kind of website you’re running, these certain plugins are always worth installing.

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This & Super keyword With Example in JAVA || JAVA Tutorial in Hindi #26 ...

In This Video I m going to show you how to use this and Super Keywords in java. ►JAVA Full Course for Absolute Beginners in Hindi : https://youtube.com/playlist?list=PLVwbZ9sSg3wPa_Uij8O0wBPMksOjfFI_l ►JAVA Pdf Notes of this tutorial: https://docs.google.com/presentation/d/1rNX1ruWGfbeURF5otddh8xbk4b9yk8lh/edit?usp=share_link&ouid=105882752155150202345&rtpof=true&sd=true ►JAVA Source Code of this tutorial: https://drive.google.com/file/d/1iByQStYJbO8_zgr2zdVIbR_H8wXvy4r_/view?usp=share_link ►JAVA Pdf Notes GDrive Folder (All Tutorial Notes): https://drive.google.com/file/d/1TC3vAUcbk5EK2hH1NRUUV-b9-pG0VMu7/view?usp=sharing ►JAVA Source Code GDrive Folder: https://drive.google.com/drive/folders/1sqVtzxVI4ZYkV4YzfE4jbcTuTNlY6uIn?usp=sharing You can follow us at: ►Facebook: https://www.facebook.com/DeathCodeYT/ ► Twitter: https://twitter.com/DeathCodeYT ► Instagram: https://www.instagram.com/deathcodeyt/ ► Reddit: https://www.reddit.com/user/DeathCodeYT ► Pinterest: https://pinterest.com/DeathCodeYT ► Our blog:  https://deathcodeyt.blogspot.com/ ► Youtube: https://youtube.com/@deathcodeyt

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Price: [price_with_discount] (as of [price_update_date] - Details) [ad_1] The length of this book is 200 pages; you may not complete reading this book in 8 hours. About This Book "JAVA in 8 hours" is a textbook for high school and college students; it covers all essential JAVA language knowledge. You can learn complete primary skills of JAVA programming fast and easily. The textbook includes a lot of practical examples for beginners and includes exercises for the college final exam, the engineer certification exam, and the job interview exam. “JAVA in 8 hours” is a useful textbook for beginners. The straightforward definitions, the plain examples, the elaborate explanations and the neat layout feature this helpful and educative book. You will be impressed by its distinctive and tidy writing style. Reading this book is a great enjoyment! Note This book is only suitable for programming beginners, high school students and college students; it is not for the experienced programmers. Table of Contents Chapter 1 What is Java? Java Program Java IDE Install Java Execute Java Program Java Comments Output Commands Escaping Characters Java Keywords Data Types Create a Variable Arithmetical Operators Logical Operators Assignment Operators Comparison Operators Conditional Operator Hands-on Project: Calculation Summary Chapter 2 If Statement If-else Statement Switch Statement For Loop While Loop Do-While Loop Break Statement Continue Statement Boolean-Expression Hands-on Project: Run 100 Times Summary Chapter 3 Create an Array (1) Create an Array (2) Array Length Element Value Sort Array Elements Math Methods Ceil ( ) & Floor ( ) Max ( ) & Min ( ) pow ( ) & sqrt ( ) Math.PI & random( ) Hands-on Project: Start with Zero Summary Chapter 4 String Length String Connection String Comparing Extract a Character Locate a Character Extract a Substring Case Change Character Replace String Type & Space StringBuffer Hands-on Project: True or False Summary Chapter 5 Method Method & Arguments Return Value Class Definition Object Declaration Class & Object Constructor Constructor Example Overloading "this" Keyword (1) "this" Keyword (2) Instance & Local variable Hands-on Project: Constructor Hands-on Project: Contact Info. Summary Chapter 6 Inheritance "super" keyword Overriding Overloading & Overriding Static Variable Static Method Final Variable Final Method( ) Final class Polymorphism Package & Import Build a Package, Import a Class Hands-on Project: Inheritance Summary Chapter 7 Abstract Abstract Example Permission Public Member Protected Member Default Member Private Member Private Example Interface Interface Example Abstract & Interface User Input Additional Class Hands-on Project: Max & Min Hands-on Project: Max & Min Summary Chapter 8 Exception Catch Exception (1) Catch Exception (2) Catch Exception (3) Finally Command Throw Exception Throws Exception File Class FileOutputStream FileInputStream Create Thread Extends Thread Implements Runnable Multi-Thread Thread's Methods Thread Methods Example Hands-on Project: Out of Range Hands-on Project: Multi-Tasks Summary JAVA Questions & Answers Questions Answers Recommended Books Paperback Searching Keywords: Java by Ray Yao Java in 8 Hours ASIN ‏ : ‎ B0BMQX5CGR Publisher ‏ : ‎ Ray Yao's Books (16 November 2022) Language ‏ : ‎ English File size ‏ : ‎ 4125 KB Text-to-Speech ‏

: ‎ Enabled Screen Reader ‏ : ‎ Supported Enhanced typesetting ‏ : ‎ Enabled X-Ray ‏ : ‎ Not Enabled Word Wise ‏ : ‎ Not Enabled Print length ‏ : ‎ 197 pages [ad_2]

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Firefox download xp

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While it started from Windows, Firefox is now compatible with almost any device and operating system. It tracks the relevant keyword not online the URL. Apart from the in-built add-ons, add-ons created by 3rd party developers can also be added to Firefox.įirefox has a Smart Location bar, which not only searches the location of a website through the URL but also searches bookmarks for the page.

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The download manager organises and shows downloads you make through the browser. Geolocation allows the search to show results based on your geographical location, which helps throw up more relevant searches. Firefox offers the feature of Smart Bookmarks, which allows users to visit their most frequently used websites on the toolbar. Incremental search gives suggestions and gives back queries that are related to our search.īookmarking helps us organise the preferred websites more, and Firefox does it efficiently. The in-built spell check tool is great for writing and content editing.

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Tabbed browsing makes it easy and quick to work on multiple windows at the same time. Some features include tabbed browsing, spell checking tool, incremental search, live bookmarking, download manager, private browsing, and geolocation. What are the main features of Mozilla Firefox? Firefox is available to download on a number of devices, including desktop, mobile, tablets, even the Amazon Firestick TV. It is a popular browser with developers and has an active community of users. Its simple and easy to use, with an excellent UI and in-built features. In short, with the help of Firefox ESR, Mozilla gives organizations from all over the globe enough time to set up the mass deployment of a new version of Firefox and ensure that everything is in order.Mozilla Firefox is an open-source browser, which launched in 2004. Firefox ESR was and will most likely continue to be one of the biggest “gifts” for administrators all over the world. The Firefox ESR branch is something that really speaks for the level of commitment towards all types of users shown by the Mozilla Foundation. In the ESR version, Serve Workers are not supported by default, push notifications are disabled, and there’s also an option to disable add-on signature enforcements. There are however some notable differences. In most part, Firefox ESR and Firefox share the same functionalities. Firefox went through a massive overhaul starting with its engine and finishing with its look. The present Firefox ESR lineįirefox fans surely know that version 60 marked a very big transformation for their favorite browser. Of course, the Firefox 52 ESR was based on the old version of Firefox so WebAssembly was not enabled by default, and the super-fast multi-process handling engine (Quantum) was no present. Nowadays, the latest versions of Firefox ESR (60+) only offer support for Adobe Flash NPAPI plugin. This proved to be invaluable for various international companies, at least for 2-3 years until they would inevitably have to move to newer versions of Windows.įirefox 52 ESR also offered support for Microsoft Silverlight and Java. This was the pre-quantum era and, back then, Firefox 52 ESR (which is still available for download) offered support for both Windows XP and Vista. The past Firefox 52 ESR – the latest version to support XP and Vistaīefore September 2017, the ESR channel was home to older versions of Firefox. These so-called point releases contain imperative security upgrades. ESR releases are maintained for more than a year with important “point releases” that usually follow the regular Firefox releases. To be more precise, Firefox ESR is an older version of Firefox with a deferred development cycle that aims to offer increased stability at the expense of the latest features.īe that as it may, the ESR line does not fully compromise security towards achieving this goal. For example, imagine a national school system having to change their entire browser system because a new release does not support some important outdated features (but relevant to the system in question) or worse because of a security vulnerability.įound under the moniker of Firefox ESR (stands for Extended Support Release), it’s a browser specifically designed for organizations that require extended support.

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One of the main issues with mass software deployment within organizations can be the lack of extended support. It may be unknown to many day-to-day users out there that the Mozilla Foundation offers a product specifically aimed at medium to extremely large organizations (schools, universities, and other international businesses).

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Java default constructor

We can write return statements inside the class. Here you will see both ways to create objects of Animal Class by using the default and parameterize constructors.Īnimal dog_tommy=new Animal("Tommy","Small Dog",5,"Black") Ī constructor doesn’t have return type while implementation, but the constructor returns the current instance of the class. Parameterize Constructor : Constructor with parameter Default Constructor : Constructor without parameter This default constructor calls the parent’s class no-argument constructor i.e super() or if no parent class extended the called constructor of Object Class i.e directly or indirectly parent class of all the class.If you declare any parameterize constructor then that is must write a default constructor.If you do not explicitly declare any constructor, then on time of compile Java compiler will automatically provide a no-argument constructor i.e also called the default constructor. All java classes must have at least one constructor.Constructors declaration with access modifiers can be used to control its access i.e so that restricts other classes to call the constructor.Constructor can not be used with keywords final, abstract, synchronized and static.Constructor always has the same name as the class name in which it exists.Parametrize Constructor: A Constructor with a number of arguments.Default Constructor: A Constructor without any argument.The constructor also contains collections of statements to execute at time object creation. In Java, Constructors are used to creating and initializing the object’s state.

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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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Java Tokens In Hindi

What is Tokens Tokens :- program के छोटे से छोटे element जिसे compiler identify करता है उसी को हम टोकंस कहते है tokens program की choti से छोटी unit होती है जिसके बिना हम कोई भी program नहीं लिख सकते  जैसे (words, syntax, special symbol, marks etc) Types of Tokens - Keywords - Identifiers - Operators  - Separators - Literals   1. Keywords :- (Keywords are reserved words whose meaning is already defined in java compiler) keywords ऐसे words होते है जिसका meaning java compiler के अंदर पहले से ही defined कर दिया है। जिसका use हम personally नहीं कर सकते है।  Examples boolean byte char double float short void int long while for do switch break continue case default if else try finally import new final volatile catch instance of public super protected class private static transient return abstract interface throws implements this extends native package synchronized throws 2. Identifiers :- Identifier हमारे program में variable का name , class का name, method का name, interface हो सकता है identifier का purpose सिर्फ identify करना है  class A { int x = 12; } यहाँ पर class name A एक identifier है जो एक class को identify कर रहा है। variable name x भी एक identifier है जो variable को define कर रहा है।  Rules of identifiers - identifier का name हम keyword name पर नहीं रख सकते है।  - identifiers case sensitive होते है।  - identifier का name हम digits से start नहीं कर सकते यह letters, underscore(-), dollar($) से start होता है।  -  identifier में हम whilespace का use नहीं कर सकते  है और इसमें (@, #, etc) special symbol का use भी नहीं कर सकते है।  3. Operators :- Special symbol को ही हम operators कहते है। इसका use हम operation perform करने के लिए करते है operators दो operands (value) के बीच में लग कर उनकी value change करते है। (2+3 = 5) six types के operators होते है।  4. Separator :- Separator का use हम statement को saperate करने के लिए करते है। separators कई तरह के होते है जैसे (), {}, , ;, : etc parantheses () parantheses का use function को call करने के लिए करते है।  braces {} curly braces का use code के block को indicate करता है।  bracket bracket का use code में array के size को defined करता है।  semi colon ; semi colon का use हम statement ending के बाद करते है।  5. Literals (Constant) :- constant भी variable की तरह होता है लेकिन constant की value को हम change नहीं कर सकते है। यह हमेशा constant रहती है। जबकि हम variable की value को change कर सकते है।    Read the full article