what is java? java introduction

 

Learn Java

Java is a popular programming language.

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

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.

Examp

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

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");
  }
}
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Learn by examples! This tutorial supplements all explanations with clarifying examples.
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What is Java?
Java is a popular programming language, created in 1995.
It is owned by Oracle, and more than 3 billion devices run Java.
It is used for:
Mobile applications (specially Android apps)
Desktop applications
Web applications
Web servers and application servers
Games
Database connection
And much, much more!
Why Use Java?
Java works on different platforms (Windows, Mac, Linux, Raspberry Pi, etc.)
It is one of the most popular programming languages in the world
It has a large demand in the current job market
It is easy to learn and simple to use
It is open-source and free
It is secure, fast and powerful
It has huge community support (tens of millions of developers)
Java is an object oriented language which gives a clear structure to programs and allows code to be reused, lowering development costs
As Java is close to C++ and C#, it makes it easy for programmers to switch to Java or vice versa
Get Started
When you are finished with this tutorial, you will be able to write basic Java programs and create real-life examples.
It is not necessary to have any prior programming experience.