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Java Tutorial

Java is a programming language.

Java is used to develop mobile apps, web apps, desktop apps, games and much more.

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Examples in Each Chapter

Our "Show Java" tool makes it easy to learn Java, it shows both the code and the result.

Example

public class MyClass {
  public static void main(String[] args) {
    System.out.println("Hello World");
  }
}

Run example »

Click on the "Run example" button to see how it works.

We recommend reading this tutorial, in the sequence listed in the left menu.

Java is an object oriented language and some concepts may be new. Take breaks when needed, and go over the examples as many times as needed.


Java Exercises

Test Yourself With Exercises

Exercise:

Insert the missing part of the code below to output "Hello World".

public class MyClass {
  public static void main(String[] args) {
    ..("Hello World");
  }
}

Start the Exercise


Learn by Examples

Learn by examples! This tutorial supplements all explanations with clarifying examples.

See All Java Examples


Java Reference

Java Keywords

Java String Methods

Java Math Methods


Download Java

Download Java from the official Java web site: https://www.oracle.com