Core Web Programming, Second Edition

6.5. Some Simple Java Programs

Following are some very basic programs to give a flavor of the language. Don't worry about understanding every detail; we'll go over things step by step later on. But it is a good idea to run these programs. Try making a few changes after successfully executing the original versions.

The Basic Hello World Application

“Application” is Java lingo for a stand-alone Java program. An application must contain a class whose name exactly matches the filename (including case) and that contains a main method declared public static void with an a single string array as an argument. A string array can be declared String[] argName, or String argName[]. Listing 6.1 presents a simple application that prints “Hello, world.” when ...