First Java Program - Welcome to Java World

Java Program - Basic Syntax:




public class ClassName {


          public static void main(String args[]){


         Variables;

    
         Statements;


    }

}



First Java Program:

public class FirstJavaProgram
{

   /* This is my first java program. 

    * This will print 'Hello World' as the
output

    */

      public static void main(String []args) {

      
System.out.println("Welcome to java world"); // prints welcome
to java World

    }

}  

First type the above code in Note pad and save with name "FirstJavaProgram.java" .

Compilation of Java program:

C:\>mydisk>javac FirstJavaProgram.java

Run the above program.

C:\>mydisk>java FirstJavaProgram

Out put is:

Welcome to java world.

Have a look at the Public static void main().

 Public:  main() method is the first method called by java environment when a program is executed so it has to accessible to from the java environment. Hence the access specifier is Public.

static:  Java environment should be able to call this method without creating an instance of the class.so this method must be declared as static.

void: Void does not return any thing so main() method is void.