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Java Source | 1995-11-13 | 1.7 KB | 53 lines |
- class ParseCmdLine {
- public static void main(String args[]) {
-
- int i = 0, j;
- String arg;
- char flag;
- boolean vflag = false;
- String outputfile = "";
-
- while (i < args.length && args[i].startsWith("-")) {
- arg = args[i++];
-
- // use this type of check for "wordy" arguments
- if (arg.equals("-verbose")) {
- System.out.println("verbose mode on");
- vflag = true;
- }
-
- // use this type of check for arguments that require arguments
- else if (arg.equals("-output")) {
- if (i < args.length)
- outputfile = args[i++];
- else
- System.err.println("-output requires a filename");
- if (vflag)
- System.out.println("output file = " + outputfile);
- }
-
- // use this type of check for a series of flag arguments
- else {
- for (j = 1; j < arg.length(); j++) {
- flag = arg.charAt(j);
- switch (flag) {
- case 'x':
- if (vflag) System.out.println("Option x");
- break;
- case 'n':
- if (vflag) System.out.println("Option n");
- break;
- default:
- System.err.println("ParseCmdLine: illegal option " + flag);
- break;
- }
- }
- }
- }
- if (i == args.length)
- System.err.println("Usage: ParseCmdLine [-verbose] [-xn] [-output afile] filename");
- else
- System.out.println("Success!");
- }
- }
-