Hi,
I am quite new to java and got following warning message after compiling:
Note:...\Player.java uses unchecked or unsave operations.
Note:Recompile with -Xlint: unchecked for details.

I got the message after adding following method:
Code:
 public boolean controleOverlappend(ArrayList<Position> coordinaten)
    {
        boolean value=false;
        Set coordinatenSet=map.keySet();
        Iterator<Position> it=coordinatenSet.iterator();
        Iterator<Position> it2=coordinaten.iterator();
        while (it2.hasNext()){
            
            while(it.hasNext()){
               value= !it2.next().equals(it.next());

            }
        }
        return value;
            
    }