public class Example{

    public static void main(String[] args) {
        System.out.println("My First  Simple Java Program");



  • The first thing that you must learn about Java is that the name you give to the source file is very important.
  • The file that holds the source code to a program is called a source file or compilation unit.
  • You should also make sure the file name matches the class name

Compiling the Java program

Open a command window and execute the following command

C:\> javac Example.java

The Java compiler creates a file Example.class that contains the bytecode program your program that contains the instruction the Java Virtual Machine will execute.

Launch the Java application by execute following command:

C:\> it java Example


My First Simple Java Program