Warning message

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;
           
    }

---

Can anyone tell me what's wrong, or is this too few information?

Java 1.5 implemented a new feature: Generics.

For more information on it check out: http://java.sun.com/j2se/1.5.0/docs/.../generics.html

Instead of using the plain Set class, you need to use the generic Set<T> where T is Key class of your Map m

Ok, thank you!