The Java Developers Almanac 1.4

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e48. The Quintessential Java Application

The parameters to the application are made available in args. This example simply prints out Hello World!.

    public class BasicApp {
        public static void main(String[] args) {
            // Process each parameter
            for (int i=0; i<args.length; i++) {
                // process args[i];
            }
    
            // Output a message to the console
            System.out.println("Hello World!");
        }
    }

Here's the command to run the program:

    > java BasicApp param1 param2 ...

Related Examples

e49. Terminating the Application
e50. Determining When the Application Is About to Exit
e51. Computing Elapsed Time
e52. Loading Native Code
e53. Implementing a Class That Can Be Sorted
e54. Redirecting Standard Output, and Error
e55. Getting the Size of the Heap

See also: Arrays Assertions Classes Commands Numbers Objects Strings System Properties Threads

© 2002 Addison-Wesley.