iterator does not return objects properly

[nooneinparticular314159]

Whenever I do:

Iterator KeyIterator = KeySet.iterator();
while (KeyIterator.hasNext()){
Attack ReturnedAttack = (Attack)
KeyIterator.next();

I get an error, either:
Exception in thread "main" java.lang.ClassCastException:
java.lang.String
at geolocation.Main.main(Main.java:141)
The process tried to write to a nonexistent pipe.

or a no such object error, even though I can verify that there are
objects in the object being iterated on.

Any idea why?

Thanks!

 

[Missaka Wijekoon]

Whenever I do:

Iterator KeyIterator = KeySet.iterator();
while (KeyIterator.hasNext()){
Attack ReturnedAttack = (Attack)
KeyIterator.next();

I get an error, either:
Exception in thread "main" java.lang.ClassCastException:
java.lang.String
at geolocation.Main.main(Main.java:141)
The process tried to write to a nonexistent pipe.

or a no such object error, even though I can verify that there are
objects in the object being iterated on.

Any idea why?

Thanks!

How about a little background? What version of the JDK? Is it Sun's?
What OS? How about a little code that can reproduce the problem?

-Missaka

 

[Alun Harford]

Whenever I do:

Iterator KeyIterator = KeySet.iterator();
while (KeyIterator.hasNext()){
Attack ReturnedAttack = (Attack)
KeyIterator.next();

I get an error, either:
Exception in thread "main" java.lang.ClassCastException:
java.lang.String

The Object in KeySet, that the iterator returns, is not of class Attack.

Alun Harford