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Chapter: Java The Complete Reference - The Java Library - java.util : More Utility Classes

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Miscellaneous Java Utility Classes and Interfaces

In addition to the classes already discussed, java.util includes the following classes:

Miscellaneous Utility Classes and Interfaces

 

In addition to the classes already discussed, java.util includes the following classes:


Base64 : Supports Base64 encoding. Encoder and Decoder nested classes are also defined. (Added by JDK 8.)

 

DoubleSummaryStatistics : Supports the compilation of double values. The following statistics are available: average, minimum, maximum, count, and sum. (Added by JDK 8.)

 

EventListenerProxy : Extends the EventListener class to allow additional II parameters. See Chapter 24 for a discussion of event listeners.

 

EventObject :  The superclass for all event classes. Events are discussed in :  :

 

FormattableFlags : Defines formatting flags that are used with the Formattable : interface. :  :

 

IntSummaryStatistics : Supports the compilation of int values. The following statistics are available: average, minimum, maximum, count, and sum. (Added by JDK 8.)

 

Objects : Various methods that operate on objects. :  :

 

PropertyPermission : Manages property permissions. :  :

 

ServiceLoader : Provides a means of finding service providers. :  :

 

StringJoiner : Supports the concatenation of CharSequences, which may include a separator, a prefix, and a suffix. (Added by JDK 8.)

 

UUID : Encapsulates and manages Universally Unique Identifiers(UUIDs).

 

The following interfaces are also packaged in java.util:

 

EventListener : Indicates that a class is an event listener. Events are discussed in Chapter 24.

 

Formattable : Enables a class to provide custom formatting.



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