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 and Interfaces
AbstractCollection	This class provides a skeletal implementation of the Collection interface to minimize the effort required to implement this interface.
AbstractList	This class provides a skeletal implementation of the List interface to minimize the effort required to implement this interface backed by a "random access" data store (such as an array).
AbstractMap	This class provides a skeletal implementation of the Map interface to minimize the effort required to implement this interface.
AbstractSequentialList	This class provides a skeletal implementation of the List interface to minimize the effort required to implement this interface backed by a "sequential access" data store (such as a linked list).
AbstractSet	This class provides a skeletal implementation of the Set interface to minimize the effort required to implement this interface.
ArrayList	Resizable-array implementation of the List interface.
Arrays	This class contains various methods for manipulating arrays (such as sorting and searching).
BitSet	This class implements a vector of bits that grows as needed.
Calendar	Calendar is an abstract base class for converting between a Date object and a set of integer fields such as YEAR MONTH DAY HOUR and so on.
Collection	The root interface in the collection hierarchy.
Collections	This class consists exclusively of static methods that operate on or return collections.
Comparator	A comparison function which imposes a total ordering on some collection of objects.
ConcurrentModificationException	This exception may be thrown by methods that have detected concurrent modification of a backing object when such modification is not permissible.
Date	The class Date represents a specific instant in time with millisecond precision.
Dictionary	The Dictionary class is the abstract parent of any class such as Hashtable which maps keys to values.
EmptyStackException	Thrown by methods in the Stack class to indicate that the stack is empty.
Enumeration	An object that implements the Enumeration interface generates a series of elements one at a time.
EventListener	A tagging interface that all event listener interfaces must extend.
EventObject	The root class from which all event state objects shall be derived.
GregorianCalendar	GregorianCalendar is a concrete subclass of Calendar and provides the standard calendar used by most of the world.
HashMap	Hash table based implementation of the Map interface.
HashSet	This class implements the Set interface backed by a hash table (actually a HashMap instance).
Hashtable	This class implements a hashtable which maps keys to values.
Iterator	An iterator over a collection.
LinkedList	Linked list implementation of the List interface.
List	An ordered collection (also known as a sequence).
ListIterator	An iterator for lists that allows the programmer to traverse the list in either direction and modify the list during iteration.
ListResourceBundle	ListResourceBundle is a abstract subclass of ResourceBundle that manages resources for a locale in a convenient and easy to use list.
Locale	A Locale object represents a specific geographical political or cultural region.
Map	An object that maps keys to values.
Map.Entry	A map entry (key-value pair).
MissingResourceException	Signals that a resource is missing.
NoSuchElementException	Thrown by the nextElement method of an Enumeration to indicate that there are no more elements in the enumeration.
Observable	This class represents an observable object or "data" in the model-view paradigm.
Observer	A class can implement the Observer interface when it wants to be informed of changes in observable objects.
Properties	The Properties class represents a persistent set of properties.
PropertyPermission	This class is for property permissions.
PropertyResourceBundle	PropertyResourceBundle is a concrete subclass of ResourceBundle that manages resources for a locale using a set of static strings from a property file.
Random	An instance of this class is used to generate a stream of pseudorandom numbers.
ResourceBundle	Resource bundles contain locale-specific objects.
Set	A collection that contains no duplicate elements.
SimpleTimeZone	SimpleTimeZone is a concrete subclass of TimeZone that represents a time zone for use with a Gregorian calendar.
SortedMap	A map that further guarantees that it will be in ascending key order sorted according to the natural ordering of its keys (see the Comparable interface) or by a comparator provided at sorted map creation time.
SortedSet	A set that further guarantees that its iterator will traverse the set in ascending element order sorted according to the natural ordering of its elements (see Comparable) or by a Comparator provided at sorted set creation time.
Stack	The Stack class represents a last-in-first-out (LIFO) stack of objects.
StringTokenizer	The string tokenizer class allows an application to break a string into tokens.
TimeZone	TimeZone represents a time zone offset and also figures out daylight savings.
TooManyListenersException	The TooManyListenersException Exception is used as part of the Java Event model to annotate and implement a unicast special case of a multicast Event Source.
TreeMap	Red-Black tree based implementation of the SortedMap interface.
TreeSet	This class implements the Set interface backed by a TreeMap instance.
Vector	The Vector class implements a growable array of objects.
WeakHashMap	A hashtable-based Map implementation with weak keys.