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Java

Programming language
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  1. 123

    Java is a high-level, object-oriented programming language first released by Sun Microsystems in 1995 and now maintained by Oracle. It is widely used for desktop applications, web applications, Android apps, enterprise systems, cloud services, and IoT devices. Its core philosophy is "Write Once, Run Anywhere", meaning compiled Java code can run on any platform with a Java Virtual Machine (JVM).

    Key Features include:

    • Object-Oriented Programming for modular, reusable code.

    • Platform Independence via JVM bytecode execution.

    • Robust & Secure with strong memory management and exception handling.

    • Multithreading for concurrent task execution.

    • Rich API & Libraries for networking, data structures, GUI, and more.

    Basic Example – Hello World in Java

    // A simple Java program
    public class HelloWorld {
    public static void main(String[] args) {
    System.out.println("Hello World!");
    }
    }
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    Execution Flow:

    1. Save as HelloWorld.java.

    2. Compile with javac HelloWorld.java → generates HelloWorld.class (bytecode).

    3. Run with java HelloWorld → JVM interprets bytecode into machine code.

    What is Java used for?
    Thanks Codecademy! What is Java? Java is an open-source, general-purpose programming language known for its versatility and stability. It’s used for everything from building websites to operating systems and wearable devices. You can even find Java in outer space, running the Mars rover.
    codecademy.com
    GeeksForGeeks
    https://www.geeksforgeeks.org/java
    Java Tutorial - GeeksforGeeks
  1. W3School
    https://www.w3schools.com › java

    Java Tutorial - W3Schools

    Java is one of the world's most widely used programming languages. Learn Java with simple explanations, practical examples, exercises, and challenges that help you build …
    Examples in Each Chapter

    Our "Try it Yourself" editor makes it easy to learn Java. You can edit Java code and view the result in your browser. Click on the "Run example" button to see how it works.

    Java Exercises

    Many chapters in this tutorial end with an exercise where you can check your level of knowledge. See all Java Exercises

    Learn by Examples

    Learn by examples! This tutorial supplements all explanations with clarifying examples. See All Java Examples

    My Learning

    Track your progress with the free "My Learning" program here at W3Schools. Log in to your account, and start earning points! This is an optional feature. You can study at W3Schools without using My Learning.

  2. GeeksForGeeks
    https://www.geeksforgeeks.org › java

    Java Tutorial - GeeksforGeeks

    • See More

    3 days ago · Java is a high-level, object-oriented programming language used to build web apps, mobile applications, and enterprise software systems. Java is a platform-independent language, which …

  3. Wikipedia
    https://en.wikipedia.org › wiki › Java_(programming...

    Java (programming language) - Wikipedia

    Java (programming language) ... Java is a high-level, general-purpose, memory-safe, object-oriented programming language. It is intended to let programmers …

  4. Programiz
    https://www.programiz.com › java-programming

    Learn Java Programming

    If you want to learn Java for free with a well-organized, step-by-step tutorial, you can use our free Java tutorials. Our tutorials will guide you through Java one step at a …

  5. Codecademy
    https://www.codecademy.com › learn › learn-ja

    Java Tutorial: Learn Java Programming | Codecademy

    Learn important Java coding fundamentals and practice your new skills with real …

    • 4.4/5
    • Category: Partially Free
  6. TutorialsPoint
    https://www.tutorialspoint.com › java

    Java Tutorial

    This Java tutorial has been written for beginners to advanced programmers who are striving to learn Java programming. We have provided numerous practical …

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  8. Coursera
    https://www.coursera.org › specializations › learn-java-programming

    Java Programming | Coursera

    Welcome to Java Programming Essentials, a foundational course designed to introduce you to the core principles of Java programming and object-oriented development in modern software environments. …

  9. oracle.com
    https://docs.oracle.com › javase › tutorial › java › index.html

    Trail: Learning the Java Language (The Java™ Tutorials) - Oracle

    This beginner Java tutorial describes fundamentals of programming in the Java programming language

  10. ThoughtCo
    https://www.thoughtco.com

    What Is Java Computer Programming Language?

    May 11, 2025 · What is the Java computer programming language? Find out what Java is, who created it, and why people choose Java over other languages.

    • Study.com
      https://study.com › Computer › Science-115
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