ArgumentParser simplifies command-line argument processing by separating arguments into positional parameters and options (any argument starting with “-” or “/” is considered an option, which may specify a value). Construct an ArgumentParser instance with your command-line arguments, then ask the ArgumentParser for parameters and options:
java YourClass -level=5 firstParam -verbose secondParamin YourClass.java: public static void main(String[] args) { ArgumentParser p = new ArgumentParser(args); if (p.hasOption("?") { printUsage(); } else { boolean verboseMode = p.hasOption("verbose"); level = p.getOption("level"); doSomethingWithParams(p.nextParam(), p.nextParam()); } }==================== ArgumentParser.java ====================import java.util.*;public class ArgumentParser { public ArgumentParser(String[] args) { for (int i = 0; i < args.length; i++) { if (args[i].startsWith("-") || args[i].startsWith("/")) { int loc = args[i].indexOf("="); String key = (loc > 0) ? args[i].substring(1, loc) :args[i].substring(1); String value = (loc > 0) ? args[i].substring(loc+1) :""; options.put(key.toLowerCase(), value); } else { params.addElement(args[i]); } } } public boolean hasOption(String opt) { return options.containsKey(opt.toLowerCase()); } public String getOption(String opt) { return (String) options.get(opt.toLowerCase()); } public String nextParam() { if (paramIndex < params.size()) { return (String) params.elementAt(paramIndex++); } return null; } private Vector params = new Vector(); private Hashtable options = new Hashtable(); private int paramIndex = 0;}
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