Error

package cmd;

import org.bukkit.Bukkit;
import org.bukkit.Sound;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;

import api.Title;
import rush.Rush;

public class Start implements CommandExecutor{

	Integer counter;

     @Override
     public boolean onCommand(CommandSender sender, Command command,String label, String[] args){

	    if(sender instanceof Player){
	    	Player p = (Player) sender;

	    	if(args.length == 0) {
				p.sendMessage("§cGebe noch eine Zahl an!");
	   }else{

		   if(args.length == 1) {

			   try {
				   String Time = args[0];
				   int time = Integer.parseInt(Time);

				   start(time);
				   p.sendMessage("§aDer Countdown wurde gestartet!");

			   }catch(NumberFormatException e) {
				   p.sendMessage("§cGebe noch eine Zahl an!");
			   }
		   }else {

		   sender.sendMessage("§4Nur fur Spieler!");
		   }
		   return false;
       }
	private void start(final int i) {

		counter = Bukkit.getScheduler().scheduleSyncDelayedTask(Rush.getPlugin(), new  Runnable() {

			int time= i + 1;

			@SuppressWarnings("deprecation")
			@Override
			public void run() {
				time--;

				for(Player p : Bukkit.getOnlinePlayers()) {
					if(time!= 1) {
						p.sendMessage("§8Das Spiel startet in §5" + time + "§8Sekunden!");
						Title.sendTitle(p, "§8Noch §2" + time);
						Title.sendSubTitle(p, "§8Sekunden!");
						p.playSound(p.getEyeLocation(), Sound.CLICK, 10F, 10F);
					} else {
						p.sendMessage("§2Das Spiel startet");
						Title.sendTitle(p, "§2Das Spiel startet!");
						Title.sendSubTitle(p, "§2Viel Spaß!");
						Bukkit.getScheduler().cancelTask(counter);
						p.playSound(p.getEyeLocation(), Sound.LEVEL_UP, 10F, 10F);
					}
}