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Packages that use java.util | |
java.lang | Provides classes that are fundamental to the design of the Java programming language. |
java.math | Provides classes for performing arbitrary-precision integer arithmetic (BigInteger) and arbitrary-precision decimal arithmetic (BigDecimal). |
java.net | Provides the classes for implementing networking applications. |
java.security | Provides the classes and interfaces for the security framework. |
java.text | Provides classes and interfaces for handling text, dates, numbers, and messages in a manner independent of natural languages. |
java.util | Contains the collections framework, legacy collection classes, event model, date and time facilities, internationalization, and miscellaneous utility classes (a string tokenizer, a random-number generator, and a bit array). |
java.util.jar | Provides classes for reading and writing the JAR (Java ARchive) file format, which is based on the standard ZIP file format with an optional manifest file. |
java.util.zip | Provides classes for reading and writing the standard ZIP and GZIP file formats. |
Classes in java.util used by java.lang | |
Comparator
A comparison function, which imposes a total ordering on some collection of objects. |
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Enumeration
An object that implements the Enumeration interface generates a series of elements, one at a time. |
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Locale
A Locale object represents a specific geographical, political,
or cultural region. |
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Properties
The Properties class represents a persistent set of
properties. |
Classes in java.util used by java.math | |
Random
An instance of this class is used to generate a stream of pseudorandom numbers. |
Classes in java.util used by java.net | |
Enumeration
An object that implements the Enumeration interface generates a series of elements, one at a time. |
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Map
An object that maps keys to values. |
Classes in java.util used by java.security | |
Collection
The root interface in the collection hierarchy. |
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Dictionary
The Dictionary class is the abstract parent of any
class, such as Hashtable , which maps keys to values. |
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Enumeration
An object that implements the Enumeration interface generates a series of elements, one at a time. |
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Hashtable
This class implements a hashtable, which maps keys to values. |
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Map
An object that maps keys to values. |
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Properties
The Properties class represents a persistent set of
properties. |
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Set
A collection that contains no duplicate elements. |
Classes in java.util used by java.text | |
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. |
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Currency
Represents a currency. |
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Date
The class Date represents a specific instant
in time, with millisecond precision. |
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Locale
A Locale object represents a specific geographical, political,
or cultural region. |
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Map
An object that maps keys to values. |
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Set
A collection that contains no duplicate elements. |
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TimeZone
TimeZone represents a time zone offset, and also figures out daylight
savings. |
Classes in java.util used by java.util | |
AbstractCollection
This class provides a skeletal implementation of the Collection interface, to minimize the effort required to implement this interface. |
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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). |
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AbstractMap
This class provides a skeletal implementation of the Map interface, to minimize the effort required to implement this interface. |
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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). |
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AbstractSet
This class provides a skeletal implementation of the Set interface to minimize the effort required to implement this interface. |
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ArrayList
Resizable-array implementation of the List interface. |
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BitSet
This class implements a vector of bits that grows as needed. |
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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. |
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Collection
The root interface in the collection hierarchy. |
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Comparator
A comparison function, which imposes a total ordering on some collection of objects. |
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Currency
Represents a currency. |
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Date
The class Date represents a specific instant
in time, with millisecond precision. |
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Dictionary
The Dictionary class is the abstract parent of any
class, such as Hashtable , which maps keys to values. |
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Enumeration
An object that implements the Enumeration interface generates a series of elements, one at a time. |
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HashMap
Hash table based implementation of the Map interface. |
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HashSet
This class implements the Set interface, backed by a hash table (actually a HashMap instance). |
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Hashtable
This class implements a hashtable, which maps keys to values. |
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Iterator
An iterator over a collection. |
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List
An ordered collection (also known as a sequence). |
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ListIterator
An iterator for lists that allows the programmer to traverse the list in either direction, modify the list during iteration, and obtain the iterator's current position in the list. |
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Locale
A Locale object represents a specific geographical, political,
or cultural region. |
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Map
An object that maps keys to values. |
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Map.Entry
A map entry (key-value pair). |
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MissingResourceException
Signals that a resource is missing. |
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Properties
The Properties class represents a persistent set of
properties. |
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Random
An instance of this class is used to generate a stream of pseudorandom numbers. |
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RandomAccess
Marker interface used by List implementations to indicate that they support fast (generally constant time) random access. |
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ResourceBundle
Resource bundles contain locale-specific objects. |
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Set
A collection that contains no duplicate elements. |
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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. |
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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. |
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TimeZone
TimeZone represents a time zone offset, and also figures out daylight
savings. |
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Vector
The Vector class implements a growable array of
objects. |
Classes in java.util used by java.util.jar | |
Collection
The root interface in the collection hierarchy. |
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Enumeration
An object that implements the Enumeration interface generates a series of elements, one at a time. |
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Map
An object that maps keys to values. |
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Set
A collection that contains no duplicate elements. |
Classes in java.util used by java.util.zip | |
Enumeration
An object that implements the Enumeration interface generates a series of elements, one at a time. |
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