/**
* Returns an iterator for the keys in the set. Remove is supported. Note that the same iterator
* instance is returned each time this method is called. Use the {@link SetIterator} constructor
* for nested or multithreaded iteration.
*/
public SetIterator<T> iterator() {
if (iterator1 == null) {
iterator1 = new SetIterator(this);
iterator2 = new SetIterator(this);
}
if (!iterator1.valid) {
iterator1.reset();
iterator1.valid = true;
iterator2.valid = false;
return iterator1;
}
iterator2.reset();
iterator2.valid = true;
iterator1.valid = false;
return iterator2;
}
private void writeObject(java.io.ObjectOutputStream s) throws java.io.IOException {
int n = count;
SetIterator i = new SetIterator();
s.defaultWriteObject();
while (n-- != 0) s.writeObject(i.next());
}
