Task

public class Task implements CommandExecutor{

	main plugin;
	String task = ChatColor.BLUE + "Task> " + ChatColor.GRAY;
	private int opentask;

	public Task(main plugin) {
		this.plugin = plugin;
	}

	@Override
	public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
		if(cmd.getName().equalsIgnoreCase("task")) {
			if(sender.hasPermission("task")) {
				if(args.length == 0) {
					sender.sendMessage(task + "\"/task help\" to see more commands.");
				}

				if(args.length > 0) {
					if(args[0].equalsIgnoreCase("help")) {
						sender.sendMessage(task + "");
						sender.sendMessage(task + "");
						sender.sendMessage(task + "");
					}
					if(args[0].equalsIgnoreCase("open")) {
						opentask = plugin.getServer().getScheduler().scheduleSyncRepeatingTask(this.plugin, new Runnable() {
							@Override
							public void run() {
								int time = 3;
								time --;
								if(time == 2) {
									Team.name.removeAll(null);
									Team.open.removeAll(null);
									Team.hidep.removeAll(null);
									Team.showp.add((Player) Bukkit.getOnlinePlayers());
								}
								if(time == 1) {
									Team.name.add(args[1].replace("_", " ").replace("&", "§"));

									Team.open.add((Player) sender);
								}
								if(time == 0) {
									plugin.getServer().getScheduler().cancelTask(opentask);
								}
							}
						}, 0, 20);
					}

					if(args[0].equalsIgnoreCase("remove")) {
						Team.open.removeAll(null);
						Team.name.removeAll(null);
						Team.showp.removeAll(null);
						Team.hidep.add((Player) Bukkit.getOnlinePlayers());
					}

					if(args[0].equalsIgnoreCase("gethide")) {
						sender.sendMessage(task + Team.hidep);
					}

					if(args[0].equalsIgnoreCase("getshow")) {
						sender.sendMessage(task + Team.showp);
					}

					if(args[0].equalsIgnoreCase("getname")) {
						sender.sendMessage(task + Team.name);
					}

					if(args[0].equalsIgnoreCase("getopen")) {
						sender.sendMessage(task + Team.open);
					}
				}
			}else {
				if(args.length > 0) {
					if(args[0].equalsIgnoreCase("hide")) {
						if(sender instanceof Player) {
							Team.showp.remove((Player) sender);
							Team.hidep.add((Player) sender);
						}else {
							sender.sendMessage(task + "You can't use this command.");
						}
					}
					if(args[0].equalsIgnoreCase("get")) {
						if(sender instanceof Player) {
							Team.open.removeAll(null);
							Team.hidep.removeAll(null);
							Team.name.removeAll(null);
							Team.open.removeAll(null);
							Team.showp.removeAll(null);
							Player p = (Player) sender;
							p.playSound(p.getLocation(), Sound.ENTITY_PLAYER_LEVELUP, 1, 0.5f);
							p.sendMessage(task + "Well done, You has finish the task.");
						}
					}
				}
			}
		}
		return false;
	}

}