Scheduler

package net.gravenilvec.Chrono;

import org.bukkit.Bukkit;
import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;

public class ChronoCommande implements CommandExecutor {

    private int timer = 10;
    private int task;
    private Chrono main;

    public ChronoCommande(Chrono chrono) {
        this.main = chrono;
    }

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

        if(sender instanceof Player){

            task = Bukkit.getScheduler().scheduleSyncRepeatingTask(main, new Runnable(){

                @Override
                public void run() {

                    if(timer == 0){
                        Bukkit.broadcastMessage("Le chrono est finit !");

                        for(Player pls : Bukkit.getOnlinePlayers()){
                            pls.getInventory().addItem(new ItemStack(Material.DIAMOND, 1));
                        }

                        Bukkit.getScheduler().cancelTask(task);
                    }else{
                        Bukkit.broadcastMessage("Le temp actuel est de : " + timer+ "s");
                    }

                    timer--;

                }

            },20,20);

        }

        return false;
    }

}