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What is Java?


     Java allows you to play online games, chat with people around the world, calculate your mortgage interest, and view images in 3D, just to name a few. It's also integral to the intranet applications and other e-business solutions that are the foundation of corporate computing.nerating HTML pages.


First Java Program:-


../ The smallest Java program possible
public class HelloWorld
{
public static void main(String[] args)
{
System.out.println("Hello World");
}
}

Step to Run this Program:-


     Write above code on notepad and save it with helloworld.java name.

1-To Run this program you need java to install on your computer if you dont have download it from here

2-After installing java set classpath (step is given below):-

  • Goto My computer properties -> Advanced -> Environment variable
  • Select path and click Edit
  • Add there your java installation directory bin folder path and click ok
  • Now classpath is set for java


3-Goto Start ->Run -> cmd. 

4-Goto that directory where you save helloworld.java file with "cd directoryname" command.

5-Then type javac helloworld.java.

6-Then type java helloworld.

7-The system should write "Hello World" on the command line.