Package java.util

Classes
class	AbstractCollection< E >
	AbstractCollection is an abstract implementation of the Collection interface. More...
class	AbstractList< E >
	AbstractList is an abstract implementation of the List interface, optimized for a backing store which supports random access. More...
class	AbstractMap< K, V >
	AbstractMap is an abstract implementation of the Map interface. More...
class	AbstractQueue< E >
	An abstract class which gives out skeletal implementations for some methods in Queue which include add, remove, and element that are based on offer, poll, and peek except that they throw exception to indicate the occurrence of some error instead of the return value of false or null. More...
class	AbstractSequentialList< E >
	AbstractSequentialList is an abstract implementation of the List interface. More...
class	AbstractSet< E >
	AbstractSet is an abstract implementation of the Set interface. More...
class	ArrayList< E >
	ArrayList is an implementation of List, backed by an array. More...
class	Arrays
	Arrays contains static methods which operate on arrays. More...
class	BitSet
	The BitSet class implements a bit field. More...
interface	Collection< E >
	Collection is the root of the collection hierarchy. More...
class	Collections
	Collections contains static methods which operate on Collection classes. More...
interface	Comparator< T >
	Comparator is used to compare two objects to determine their ordering in respect to each other. More...
class	ConcurrentModificationException
	This runtime exception is thrown when a Collection is modified and an existing iterator on the Collection is used to modify the Collection as well. More...
class	Dictionary< K, V >
	Dictionary is a abstract class which is the superclass of all classes that associate keys with values, such as Hashtable. More...
class	DuplicateFormatFlagsException
	The unchecked exception will be thrown out if there are duplicate flags given out in the format specifier. More...
class	EmptyStackException
	Runtime exception which is thrown when pop/peek method of stack is executed on a stack which is empty. More...
class	EnumMap< K extends Enum< K >, V >
class	EnumSet< E extends Enum< E >>
interface	Enumeration< E >
	An Enumeration is used to sequence over a collection of objects. More...
interface	EventListener
	EventListener is the superclass of all event listener interfaces. More...
class	EventListenerProxy
	This abstract class provides a simple wrapper to types of EventListener. More...
class	EventObject
	EventObjects represent events. More...
class	FormatFlagsConversionMismatchException
	The unchecked exception will be thrown out if a conversion and flags are incompatible. More...
interface	Formattable
	Any class that need to perform customer formatting by transferring converter specifier 's' to Formatter should implement the Formattable interface. More...
class	FormattableFlags
	FormattableFlags are used as a parameter to method Formattable.formatTo() and instruct the output format in Formattables. More...
class	Formatter
	Formatter provides the method to give out formatted string just like the printf-style. More...
class	FormatterClosedException
	The unchecked exception will be thrown out if the formatter has been closed. More...
class	GregorianCalendar
	GregorianCalendar provides the conversion between Dates and integer calendar fields, such as the month, year or minute, for the Gregorian calendar. More...
class	HashMap< K, V >
	HashMap is an implementation of Map. More...
class	HashSet< E >
	HashSet is an implementation of Set. More...
class	Hashtable< K, V >
	Hashtable associates keys with values. More...
class	HugeEnumSet< E extends Enum< E >>
	This is a concrete subclass of EnumSet designed specifically for enum type with more than 64 elements. More...
class	IdentityHashMap< K, V >
	IdentityHashMap. More...
class	IllegalFormatCodePointException
	The unchecked exception will be thrown out if an invalid Unicode code point, which is Character.isValidCodePoint(int), is passed as a parameter to Formatter. More...
class	IllegalFormatConversionException
	The unchecked exception will be thrown out when the parameter is incompatible with the corresponding format specifier. More...
class	IllegalFormatException
	Unchecked Exception that is to be thrown out when a format string that contains either an illegal syntax or format specifier is transferred as a parameter. More...
class	IllegalFormatFlagsException
	The unchecked exception will be thrown out if the combination of the format flags is illegal. More...
class	IllegalFormatPrecisionException
	The unchecked exception will be thrown out when the precision is a negative other than -1, or the conversion does not support a precision or other cases when the precision is not supported. More...
class	IllegalFormatWidthException
	The unchecked exception will be thrown out when the width is a negative other than -1, or the conversion does not support a width or other cases when the width is not supported. More...
class	InputMismatchException
	An InputMismatchException is thrown by a scanner to indicate that the next token does not match the pattern the specified type. More...
class	InvalidPropertiesFormatException
interface	Iterator< E >
	An Iterator is used to sequence over a collection of objects. More...
class	LinkedHashMap< K, V >
	LinkedHashMap is a variant on HashMap. More...
class	LinkedHashSet< E >
	LinkedHashSet is a variant on HashSet. More...
class	LinkedList< E >
	LinkedList is an implementation of List, backed by a linked list. More...
interface	List< E >
	List is a collection which maintains an ordering for its elements. More...
interface	ListIterator< E >
	An ListIterator is used to sequence over a List of objects. More...
class	ListResourceBundle
	ListResourceBundle is the abstract superclass of classes which provide resources by implementing the getContents() method to return the list of resources. More...
interface	Map< K, V >
	Map has a set of keys, each key is mapped to a single value. More...
class	MapEntry< K, V >
	MapEntry is an internal class which provides an implementation of Map.Entry. More...
class	MiniEnumSet< E extends Enum< E >>
	This is a concrete subclass of EnumSet designed specifically for enum type with less than or equal to 64 elements. More...
class	MissingFormatArgumentException
	The unchecked exception will be thrown out if there no corresponding argument with the specified conversion or an argument index that refers to a missing argument. More...
class	MissingFormatWidthException
	The unchecked exception will be thrown out if the format width is missing but is required. More...
class	MissingResourceException
	This runtime exception is thrown by ResourceBundle when a resouce bundle cannot be found or a resource is missing from a resource bundle. More...
class	NoSuchElementException
	This runtime exception is thrown when trying to retrieve an element past the end of an Enumeration, or the first or last element from an empty Vector. More...
class	Observable
	Observable is used to notify a group of Observer objects when a change occurs. More...
interface	Observer
	Observer must be implemented by objects which are added to an Observable. More...
class	PriorityQueue< E >
	PriorityQueue holds elements on a priority heap, which orders elements according to the comparator specified at construction or their natural order. More...
class	PropertyPermission
	PropertyPermission objects represent permission to access system properties. More...
class	PropertyPermissionCollection
	A PermissionCollection for holding PropertyPermissions. More...
class	PropertyResourceBundle
	PropertyResourceBundle loads resources from an InputStream. More...
interface	Queue< E >
	A kind of collection provides advanced operations than other basic collections, such as insertion, extraction, and inspection. More...
class	Random
	This class provides methods that generates pseudo-random numbers of different types, such as int, long, double and float using either. More...
interface	RandomAccess
	RandomAccess is implemented by List implementations that support fast (usually constant time) random access. More...
class	ResourceBundle
	ResourceBundle is an abstract class which is the superclass of classes which provide locale specific resources. More...
class	Scanner
	A parser that parses a text string of primitive types and strings with the help of regular expressions. More...
interface	Set< E >
	Set is a collection which does not allow duplicate elements. More...
interface	SortedMap< K, V >
	SortedMap is a Map where the iterators sequence in order of the sorted keys. More...
interface	SortedSet< E >
	SortedSet is a Set which iterates its elements in sorted order. More...
class	Stack< E >
	Stack is a Last-In/First-Out(LIFO) data structure which represents a stack of objects. More...
class	StringTokenizer
	String tokenizer is used to break a string apart into tokens. More...
class	TimeZones
class	Timer
	Timers are used to schedule jobs for execution in a background process. More...
class	TimerTask
	The TimerTask class is represents a task to run at specified time. More...
class	TooManyListenersException
	This exception is thrown when an attempt is made to add more than one listener to an event source which only supports a single listener. More...
class	TreeMap< K, V >
	TreeMap is an implementation of SortedMap. More...
class	TreeSet< E >
	TreeSet is an implementation of SortedSet. More...
class	UUID
class	UnknownFormatConversionException
	The unchecked exception will be thrown out if the format conversion is unknown. More...
class	UnknownFormatFlagsException
	The unchecked exception will be thrown out if there is an unknown flag. More...
class	Vector< E >
	Vector is a variable size contiguous indexable array of Objects. More...
class	WeakHashMap< K, V >
	WeakHashMap is an implementation of Map with keys which are WeakReferences. More...
class	Calendar
	Calendar is an abstract class which provides the conversion between Dates and integer calendar fields, such as the month, year or minute. More...
class	Currency
	This class represents a currency as identified in the ISO 4217 currency codes. More...
class	Date
	Date represents a specific moment in time, to the millisecond. More...
class	Locale
	Locale represents a language/country/variant combination. More...
class	Properties
	Properties is a Hashtable where the keys and values must be Strings. More...
class	SimpleTimeZone
	SimpleTimeZone represents a local time zone and its daylight savings time rules for the gregorian calendar. More...
class	TimeZone
	TimeZone is an abstract class which represents a local time zone and its daylight savings time rules. More...
Packages
package	concurrent
package	jar
package	logging
package	prefs
package	regex
package	zip