Expanding commands

When It comes to commands like this /supachat player prefix set <player> <prefix>, I get confused. Its like I don't know how to get from /supachat player to /supachat player prefix and that to /supachat player prefix set. Then the set to the <player> and that to <prefix>.

Any tips or examples?

Code:

            public boolean onCommand(CommandSender sender, Command command, String label, String[] args)
            {
                if (command.getName().equalsIgnoreCase("supachat")) {
                    if (((sender instanceof Player)) && (!this.API.checkPermissions((Player)sender, "supachat.reload").booleanValue())) {
                        sender.sendMessage("[SupaChat] Permission Denied");
                        return true;
                    }
                    sender.sendMessage("/supachat reload - Used to reload SupaChat's config.");
                    sender.sendMessage("/supachat prefix - Shows commands to this.");
                    
                }
                if (((sender instanceof Player)) && (!this.API.checkPermissions((Player)sender, "supachat.reload").booleanValue())) {
                    sender.sendMessage("[SupaChat] Permission Denied");
                    return true;
                }
                if (args.length != 1) return false;
                if (args[0].equalsIgnoreCase("player")) {
                    sender.sendMessage("/supachat player prefix set <player> <prefix> - Shows commands to this.");
                    sender.sendMessage("/supachat player suffix set <player> <prefix> - Shows commands to this.");
                }
                if(args.length == 2) {
                    if (args[0].equalsIgnoreCase("player")) {
                        
                    }
                    }
                return false;
            }

 

It's basically just a lot of args checks. In your case, you would need to check if the args.length is 5, 0 is player, 1 is prefix, 2 is set, and so on.