Using command arguements

I'm semi-new to java(took a semister class @ college), as well as new to plugin development. How do I pass a command arguement to a method.

e.g. I have with onCommand - if(cmd.getName().equalsIgnoreCase("refer")) and I want to pass on a player name typed after the refer( /refer <name>, I need the <name>)

 

/refer args[0] args[1] args[2]
and so on..

so the first after the command is:
args[0]

this prints out the first thing you wrote after /refer

Code:

public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args) {
    if (commandLabel.equalsIgnoreCase("refer")) {
        if (args.length == 1) {
            sender.sendMessage(args[0]);
            return true;
        } else {
            sender.sendMessage("Invalid arguments!");
        }
    }
    return false;
}

 

thanks, that makes life so much easier than what I was trying.