public void printUsage()

in maven-wrapper/src/main/java/org/apache/maven/wrapper/cli/CommandLineParser.java [174:211]
36 lines of code
9 McCabe index (conditional complexity)

    public void printUsage(Appendable out) {
        Formatter formatter = new Formatter(out);
        Set<CommandLineOption> orderedOptions = new TreeSet<>(new OptionComparator());
        orderedOptions.addAll(optionsByString.values());
        Map<String, String> lines = new LinkedHashMap<>();
        for (CommandLineOption option : orderedOptions) {
            Set<String> orderedOptionStrings = new TreeSet<>(new OptionStringComparator());
            orderedOptionStrings.addAll(option.getOptions());
            List<String> prefixedStrings = new ArrayList<>();
            for (String optionString : orderedOptionStrings) {
                if (optionString.length() == 1) {
                    prefixedStrings.add("-" + optionString);
                } else {
                    prefixedStrings.add("--" + optionString);
                }
            }

            String key = join(prefixedStrings, ", ");
            String value = option.getDescription();
            if (value == null || value.length() == 0) {
                value = "";
            }

            lines.put(key, value);
        }
        int max = 0;
        for (String optionStr : lines.keySet()) {
            max = Math.max(max, optionStr.length());
        }
        for (Map.Entry<String, String> entry : lines.entrySet()) {
            if (entry.getValue().length() == 0) {
                formatter.format("%s%n", entry.getKey());
            } else {
                formatter.format("%-" + max + "s  %s%n", entry.getKey(), entry.getValue());
            }
        }
        formatter.flush();
    }