A collection problem with TreeMap

Question

Could somebody please help me with this kind of problem
I couldn't get the correct object from the get(key) method and all the objects in the map become the last object put in, when I use the followings:
Collection keys=this.keySet();
Iterator iter=keys.iterator();
while(iter.hasNext())
XX xx=(XX)this.get(iter.next());
But when I try to iterate the values instead of the keys, the objects are correct.
Collection values=this.values();
Iterator iter=values.iterator();
while(iter.hasNext())
XX xx=(XX)iter.next();
But I do need the get(key) method sometimes.
Anybody got some suggestions please.
Thanks.

Answer 1

Thanks.
I am using TreeMap. I actually don't want the keys to get overwritten, so the keys in the Map is comparable according to the counter.
There is a class extends TreeMap. I need to use another getElement method sometimes.
public class MyTree extends TreeMap{
public MyTree () {
public Element getElement(int id, double rate)
Collection values=this.values();
Iterator iter=values.iterator();
while(iter.hasNext())
Element ele=( Element)iter.next();
if(ele.isMe(id, rate))
return ele;
return null;
public String toString()
String eleString="";
Collection values=this.values();
Iterator iter=values.iterator();
while(iter.hasNext())
Element ele=( Element)iter.next();
eleString += ele.toString()+ "\n";
return eleString;
}