Package java.util

Added Classes
Timer	A facility for threads to schedule tasks for future execution in a background thread.
TimerTask	A task that can be scheduled for one-time or repeated execution by a Timer.

 

Changed Classes
AbstractSet	This class provides a skeletal implementation of the Set interface to minimize the effort required to implement this interface.
Collections	This class consists exclusively of static methods that operate on or return collections.
WeakHashMap	A hashtable-based Map implementation with weak keys.