Hashtable keys( ) question

Question

Hello guys,
I have a question regarding hashtables.
Here is a method which returns a vector that contains some items:
public Vector getVectorItems()
        Vector oVector  = new Vector();
        Enumeration oEnum = coQueue.keys();
        while (oEnum.hasMoreElements())
                oVector.add((String)oEnum.nextElement());
        return oVector;
}My Question:
There are times that when oVector is returned, it is empty.
Up to now, I'm still wondering why is the vector was empty.
Thank you very much for your help.

Answer 1

You can use an Iterator instead ...
public Vector getVectorItems() {
Vector oVector = new Vector();
Iterator iter = ((Set)coQueue.keySet()).iterator();
while (iter.hasNext()) {
oVector.add((String)iter.next());
return oVector;
Also, assuming coQueue is a HashMap, use the function KeySet() instead of keys().
try it ....