Overview | Package | Class | Tree | Index | Help
PREV PACKAGE | NEXT PACKAGE	FRAMES | NO FRAMES

Package java.util

Interface Summary

Collection	The root interface in the collection hierarchy.
Comparator	A comparison function, which imposes a partial or total ordering on some collection of Objects.
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
Iterator	An iterator over a Collection.
ListIterator	An Iterator for Lists that allows the programmer to traverse the List in either direction and modify the list during iteration.
List	An ordered Collection (also known as a sequence).
Map.Entry	A Map entry (key-value pair).
Map	An object that maps keys to values.
Observer	A class can implement the Observer interface when it wants to be informed of changes in observable objects.
Set	A Collection that contains no duplicate elements.
SortedMap	A Map that further guarantees that it will be in ascending key order, sorted according to the natural ordering of its keys (see Comparable), or by a Comparator provided at SortedMap 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 SortedSet creation time.

Class Summary

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).
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.
Collections.SynchronizedCollection
Collections.SynchronizedList
Collections.SynchronizedSet
Collections.SynchronizedSortedMap
Collections.SynchronizedSortedSet
Collections.UnmodifiableCollection
Collections.UnmodifiableList
Collections.UnmodifiableMap.UnmodifiableEntrySet	We need this class in addition to UnmodifiableSet as Map.
Collections.UnmodifiableSet
Collections.UnmodifiableSortedMap
Collections.UnmodifiableSortedSet
Collections	This class consists exclusively of static methods that operate on or return Collections.
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.
EventObject	The Event class is the abstract 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.
Hashtable	This class implements a hashtable, which maps keys to values.
LinkedList	Linked list implementation of the List interface.
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.
Observable	This class represents an observable object, or "data" in the model-view paradigm.
Properties	The Properties class represents a persistent set of properties.
PropertyPermissionCollection	A PropertyPermissionCollection stores a set of PropertyPermission permissions.
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.
SimpleTimeZone	SimpleTimeZone is a concrete subclass of TimeZone that represents a time zone for use with a Gregorian calendar.
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.
SubList
TimeZoneData	Encapsulates data for international timezones.
TimeZone	TimeZone represents a time zone offset, and also figures out daylight savings.
TreeMap.Entry	Node in the Tree.
TreeMap	Red-Black tree based implementation of the Map interface.
TreeSet	This class implements the Set interface, backed by a TreeMap.
Vector	The Vector class implements a growable array of objects.
WeakHashMap	A hashtable-based Map implementation with weak keys.

Exception Summary

ConcurrentModificationException	This exception may be thrown by methods that have detected concurrent modification of a backing object when such modification is not permissible.
EmptyStackException	Thrown by methods in the Stack class to indicate that the stack is empty.
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.
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.