TECH-TADKA

Sample of java program to print " Hello Java" on screen with short

 description to easy understand the java program.

Sample Program

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


     class name and file name are same.

     public is a access specifier this define the scope of the method or class.

     static means that method is associated with the class, not a specific instance(object)
     of  that class.

    void specify the return type of the method.

    array args[] is a String array use to get value from command line argument.

    In System.out.println()
            - System is a in-built class which is present in "java.lang" package.
    - out is a static final field (ie, variable) in System class which is of the type
               PrintStream ( a built-in class, contains methods to print the different data values ).
    - println() is a method use to print any message in nee line. we also use print()
               method is to print message is current line.

    how to compile ?
    javac programName.java;
    ex:-  javac Hello.java;

    how to Run ?
            java MainClassName;
    MainClassName means class which contain main method.
    ex:- java Hello

    O/P :-