View difference between Paste ID: GkME6uhh and SB2XR1h2

 static HashMap<Player, Long> playtime = new HashMap<>();
 
 public interface Callback<T>{
     public void execute(Long response);
 }
 
 public static void doAsyncGetPlaytime(final Player p, final Callback<Boolean> callback){
     new BukkitRunnable(){
 
         @Override
         public void run(){
 
 
         	playtime.put(p, 0L);
             try{
 				PreparedStatement ps = plugin.MySQL.openConnection().prepareStatement("SELECT playtime FROM users WHERE UUID='"+p.getUniqueId().toString()+"'");
 				ResultSet rs = ps.executeQuery();
 				if(rs.next()){
 					playtime.put(p, rs.getLong("playtime"));
 				}
 				rs.close();
 			}catch(Exception ex){
 				ex.printStackTrace();
 			}
 
             new BukkitRunnable()
             {
                 @Override
                 public void run()
                 {
                     callback.execute(playtime.get(p));
                 }
             }.runTask(plugin);
         }
     }.runTaskAsynchronously(plugin);
 }
 
 Callback<Long> callback = new Callback<Long>()
 	{
 	    public void execute(Long l)
 	    {
-	        // Do whatever with the boolean
+	        return l;
 	    }
 	};