server.log

>tc
[14:54:05 INFO]: TranceClans.

Usage:
  tc clan new <name>
  tc clan modify (name|tag|member|leader|invite) <value>
  tc (join|leave|disband)
  tc (invite|kick) <player>
  tc leaderboard
  tc (-h | --help)

Options:
  -h --help     Show this screen.

>tc clan new test
[14:54:07 INFO]: {new=true, leader=false, <name>=test, modify=false, <value>=null, leaderboard=false, kick=false, --help=false, leave=false, clan=true, name=false, member=false, <player>=null, tag=false, invite=false, join=false, disband=false}
>tc kick player
[14:54:13 INFO]: {new=false, leader=false, <name>=null, modify=false, <value>=null, leaderboard=false, kick=true, --help=false, leave=false, clan=false, name=false, member=false, <player>=player, tag=false, invite=false, join=false, disband=false}

test.java

public class CommandHandler implements CommandExecutor {
    private final String doc = String.join("\n", 
        "TranceClans.",
        "",
        "Usage:",
        "  tc clan new <name>",
        "  tc clan modify (name|tag|member|leader|invite) <value>",
        "  tc (join|leave|disband)",
        "  tc (invite|kick) <player>",
        "  tc leaderboard",
        "  tc (-h | --help)",
        "",
        "Options:",
        "  -h --help     Show this screen.",
        ""
    );
   
    
    @Override
    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] rargs) {
        Map<String, Object> opts = docoptCommandParser(rargs);
        if (opts == null) {
            sender.sendMessage(this.doc);
            return true;
        }
        System.out.println(opts);
        
        return true;
    }
    
    private Map<String, Object> docoptCommandParser(String[] rargs) {
        try {
            return new Docopt(this.doc).withExit(false).parse(rargs);
        } catch( DocoptExitException ignore) {
            return null;
        }
    }
}