src/main/java/org/deephacks/tools4j/cli/GNUishParser.java
private String[] parseOpts(String[] args) {

        if (args == null || args.length == 0) {
            return new String[0];
        }
        final List<String> remainingArgs = new ArrayList<String>();
        final List<String> argsList = Arrays.asList(args);
        final ListIterator<String> argsIt = argsList.listIterator();

        while (argsIt.hasNext()) {
            String word = argsIt.next();
            if (word.startsWith("--")) {
                // long option --foo
                final String option = stripLeadingHyphens(word);
                if (VERBOSE_LONG_OPT.equals(option)) {
                    longOpts.put(option, "true");
                } else if (DEBUG_LONG_OPT.equals(option)) {
                    longOpts.put(option, "true");
                } else if (HELP_LONG_OPT.equals(option)) {
                    longOpts.put(option, "true");
                } else {
                    final String arg = parseOptionArg(option, argsIt);
                    longOpts.put(option, arg);
                }

            } else if (word.startsWith("-")) {
                String options = stripLeadingHyphens(word);

                // single short option -f
                if (options.length() == 1) {
                    // only slurp argument if option is argumented
                    final String arg = parseOptionArg(options, argsIt);
                    shortOpts.put(options, arg);
                    continue;
                }
                // multiple short options -fxy, 
                // treat as non-argumented java.lang.Boolean variables, no slurp 
                for (int i = 0; i < options.length(); i++) {
                    final String option = Character.toString(options.charAt(i));
                    shortOpts.put(option, "true");
                }
            } else {
                remainingArgs.add(word);
            }
        }
        return remainingArgs.toArray(new String[0]);
    }
private String[] parseOpts(String[] args) {

        if (args == null || args.length == 0) {
            return new String[0];
        }
        final List<String> remainingArgs = new ArrayList<String>();
        final List<String> argsList = Arrays.asList(args);
        final ListIterator<String> argsIt = argsList.listIterator();

        while (argsIt.hasNext()) {
            String word = argsIt.next();
            if (word.startsWith("--")) {
                // long option --foo
                final String option = stripLeadingHyphens(word);
                if (VERBOSE_LONG_OPT.equals(option)) {
                    longOpts.put(option, "true");
                } else if (DEBUG_LONG_OPT.equals(option)) {
                    longOpts.put(option, "true");
                } else if (HELP_LONG_OPT.equals(option)) {
                    longOpts.put(option, "true");
                } else {
                    final String arg = parseOptionArg(option, argsIt);
                    longOpts.put(option, arg);
                }

            } else if (word.startsWith("-")) {
                String options = stripLeadingHyphens(word);

                // single short option -f
                if (options.length() == 1) {
                    // only slurp argument if option is argumented
                    final String arg = parseOptionArg(options, argsIt);
                    shortOpts.put(options, arg);
                    continue;
                }
                // multiple short options -fxy, 
                // treat as non-argumented java.lang.Boolean variables, no slurp 
                for (int i = 0; i < options.length(); i++) {
                    final String option = Character.toString(options.charAt(i));
                    shortOpts.put(option, "true");
                }
            } else {
                remainingArgs.add(word);
            }
        }
        return remainingArgs.toArray(new String[0]);
    }
Parse the options for the command.

@param args includes the options and arguments, command word have been stripped.
@return the remaining terminal args, if any