Trivial demostration of GetOpt. If -h present, print help.

GetOptSimple.java

import com.darwinsys.util.GetOpt;
/** Trivial demonstration of GetOpt. If -h present, print help.
 */
public class GetOptSimple {
 public static void main(String[] args) {
 GetOpt go = new GetOpt("h");
 char c;
 while ((c = go.getopt(args)) !=GetOpt.DONE) {
 switch(c) {
 case 'h':
 helpAndExit(0);
 break;
 default:
 System.err.println("Unknown option in " +
 args[go.getOptInd( )-1]);
 helpAndExit(1);
 }
 }
 System.out.println( );
 }
 /** Stub for providing help on usage
 * You can write a longer help than this, certainly.
 */
 static void helpAndExit(int returnValue) {
 System.err.println("This would tell you how to use this program");
 System.exit(returnValue);
 }
 }