HelloWorld.java

/******************************************************************************
 *  *  Compilation:  javac HelloWorld.java
 *   *  Execution:    java HelloWorld
 *    *
 *     *  Prints "Hello, World". By tradition, this is everyone's first program.
 *      *
 *       *  % java HelloWorld
 *        *  Hello, World
 *         *
 *          *  These 17 lines of text are comments. They are not part of the program;
 *           *  they serve to remind us about its properties. The first two lines tell
 *            *  us what to type to compile and test the program. The next line describes
 *             *  the purpose of the program. The next few lines give a sample execution
 *              *  of the program and the resulting output. We will always include such 
 *               *  lines in our programs and encourage you to do the same.
 *                *
 *                 ******************************************************************************/

import java.io.*;

class HelloWorldApp {
    public static void main(String[] args) {
        System.out.println("Hello World!"); // Display the string.
    }
}