IMPLEMENTING A JAVA PROGRAM

Steps to be followed to implement a Java Program:

Creating the program

Compiling the program

Running the program

Creating the program

We can create a program using any text editor.

Class Sample

{

public static void main(String args[])

{

System.out.println(“ HELLO “);

}

}

We must save this program with the filename Sample.java ensuring that the filename and

classname should be same. This file is called as source file. If a program contains multiple

classes, the filename must be the classname of the class containing the main method.

Compiling the program

C:\> javac Sample.java

The javac compiler creates a file called Sample.class that contains the bytecode version of the

program.

Running the program

C:\> java Sample

Now the interpreter looks for the main method in the program and begins execution from

there.