1 | import gnu.getopt.LongOpt;
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2 | import gnu.getopt.Getopt;
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3 |
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4 | /*
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5 | * This sample code was written by Aaron M. Renn and is a demonstration
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6 | * of how to utilize some of the features of the GNU getopt package. This
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7 | * sample code is hereby placed into the public domain by the author and
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8 | * may be used without restriction.
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9 | */
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10 |
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11 | public class GetoptDemo
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12 | {
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13 |
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14 | public static void
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15 | main(String[] argv)
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16 | {
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17 | int c;
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18 | String arg;
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19 | LongOpt[] longopts = new LongOpt[3];
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20 | //
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21 | StringBuffer sb = new StringBuffer();
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22 | longopts[0] = new LongOpt("help", LongOpt.NO_ARGUMENT, null, 'h');
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23 | longopts[1] = new LongOpt("outputdir", LongOpt.REQUIRED_ARGUMENT, sb, 'o');
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24 | longopts[2] = new LongOpt("maximum", LongOpt.OPTIONAL_ARGUMENT, null, 2);
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25 | //
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26 | Getopt g = new Getopt("testprog", argv, "-:bc::d:hW;", longopts);
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27 | g.setOpterr(false); // We'll do our own error handling
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28 | //
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29 | while ((c = g.getopt()) != -1)
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30 | switch (c)
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31 | {
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32 | case 0:
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33 | arg = g.getOptarg();
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34 | System.out.println("Got long option with value '" +
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35 | (char)(new Integer(sb.toString())).intValue()
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36 | + "' with argument " +
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37 | ((arg != null) ? arg : "null"));
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38 | break;
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39 | //
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40 | case 1:
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41 | System.out.println("I see you have return in order set and that " +
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42 | "a non-option argv element was just found " +
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43 | "with the value '" + g.getOptarg() + "'");
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44 | break;
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45 | //
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46 | case 2:
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47 | arg = g.getOptarg();
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48 | System.out.println("I know this, but pretend I didn't");
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49 | System.out.println("We picked option " +
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50 | longopts[g.getLongind()].getName() +
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51 | " with value " +
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52 | ((arg != null) ? arg : "null"));
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53 | break;
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54 | //
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55 | case 'b':
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56 | System.out.println("You picked plain old option " + (char)c);
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57 | break;
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58 | //
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59 | case 'c':
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60 | case 'd':
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61 | arg = g.getOptarg();
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62 | System.out.println("You picked option '" + (char)c +
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63 | "' with argument " +
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64 | ((arg != null) ? arg : "null"));
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65 | break;
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66 | //
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67 | case 'h':
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68 | System.out.println("I see you asked for help");
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69 | break;
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70 | //
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71 | case 'W':
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72 | System.out.println("Hmmm. You tried a -W with an incorrect long " +
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73 | "option name");
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74 | break;
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75 | //
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76 | case ':':
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77 | System.out.println("Doh! You need an argument for option " +
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78 | (char)g.getOptopt());
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79 | break;
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80 | //
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81 | case '?':
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82 | System.out.println("The option '" + (char)g.getOptopt() +
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83 | "' is not valid");
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84 | break;
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85 | //
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86 | default:
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87 | System.out.println("getopt() returned " + c);
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88 | break;
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89 | }
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90 | //
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91 | for (int i = g.getOptind(); i < argv.length ; i++)
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92 | System.out.println("Non option argv element: " + argv[i] + "\n");
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93 | }
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94 |
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95 | } // Class GetoptDemo
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96 |
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97 |
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