Uses of Package
java.util

Packages that use java.util

Package	Description
java.io	Input/Output support
java.lang	Core Java classes
java.text	Provides classes and interfaces for handling text, dates, numbers, and messages in a manner independent of natural languages.
java.util	Utilities
tijos.framework.networkcenter.ntp	Network time protocol client class
tijos.framework.util.json	JSON-java suppport

Classes in java.util used by java.io

Class and Description
Enumeration Interface for lists of objects that can be returned in sequence.
Locale Locales represent a specific country and culture.

Classes in java.util used by java.lang

Class and Description
Iterator An object which iterates over a collection.

Classes in java.util used by java.text

Class and Description
Locale Locales represent a specific country and culture.
Map An object that maps keys onto values.
Set A collection that contains no duplicates.

Classes in java.util used by java.util

Class and Description
AbstractCollection A basic implementation of most of the methods in the Collection interface to make it easier to create a collection.
AbstractList A basic implementation of most of the methods in the List interface to make it easier to create a List based on a random-access data structure.
AbstractMap An abstract implementation of Map to make it easier to create your own implementations.
AbstractQueue This class provides skeletal implementations of some Queue operations.
AbstractSequentialList Abstract superclass to make it easier to implement the List interface when backed by a sequential-access store, such as a linked list.
AbstractSet An abstract implementation of Set to make it easier to create your own implementations.
ArrayDeque Resizable-array implementation of the Deque interface.
ArrayList An array-backed implementation of the List interface.
BitSet This class can be thought of in two ways.
Calendar This class is an abstract base class for Calendars, which can be used to convert between Date objects and a set of integer fields which represent YEAR, MONTH, DAY, etc.
Collection Interface that represents a collection of objects.
Comparator Interface for objects that specify an ordering between objects.
Date This class represents a specific time in milliseconds since the epoch.
Deque A linear collection that supports element insertion and removal at both ends.
Dictionary A Dictionary maps keys to values; how it does that is implementation-specific.
Enumeration Interface for lists of objects that can be returned in sequence.
Formatter A Java formatter for printf-style format strings, as seen in the C programming language.
HashMap This class provides a hashtable-backed implementation of the Map interface.
HashSet This class provides a HashMap-backed implementation of the Set interface.
Hashtable A class which implements a hashtable data structure.
Iterator An object which iterates over a collection.
List An ordered collection (also known as a list).
ListIterator An extended version of Iterator to support the extra features of Lists.
Locale Locales represent a specific country and culture.
Map An object that maps keys onto values.
Map.Entry A map entry (key-value pair).
NavigableMap A SortedMap extended with navigation methods returning the closest matches for given search targets.
NavigableSet A SortedSet extended with navigation methods reporting closest matches for given search targets.
NoSuchElementException NoSuchElementException is a Exception used with StringTokenizer
Observable This class represents an object which is observable.
Observer Interface that is implemented when a class wants to be informed of changes in Observable objects.
PriorityQueue
Properties A set of persistent properties, which can be saved or loaded from a stream.
Queue A collection designed for holding elements prior to processing.
Random This class generates pseudorandom numbers.
RandomAccess Marker interface used to inform List implementations that they support fast (usually constant time) random access.
Set A collection that contains no duplicates.
SortedMap A map which guarantees its key's iteration order.
SortedSet A set which guarantees its iteration order.
TimerTask Task that can be run at a later time if given to a Timer.
UUID This class represents a 128-bit UUID value.
Vector The Vector classes implements growable arrays of Objects.

Classes in java.util used by tijos.framework.networkcenter.ntp

Class and Description
Date This class represents a specific time in milliseconds since the epoch.
List An ordered collection (also known as a list).

Classes in java.util used by tijos.framework.util.json

Class and Description
Collection Interface that represents a collection of objects.
Iterator An object which iterates over a collection.
List An ordered collection (also known as a list).
Map An object that maps keys onto values.
Set A collection that contains no duplicates.