| Package |
Enhancements |
More Information |
java.lang
Provides classes that are fundamental to the design of
the Java programming language such as String, Math, and basic
runtime support for threads and processes.
|
J2SE 5.0,
J2SDK 1.4, and
J2SDK 1.3
|
|
java.lang.annotation
Provides library support for the Java programming
language annotation facility.
|
New in J2SE 5.0 |
|
java.lang.instrument
Provides services that allow Java programming language
agents to instrument programs running on the JVM.
|
Java SE 6 and
J2SE 5.0 |
|
java.lang.management
Provides the management interface for monitoring and
management of the JVM as well as the operating system on which the
JVM is running.
|
Java SE 6 |
|
java.lang.ref
Provides reference-object classes, which support a
limited degree of interaction with the garbage
collector.
|
New in J2SDK 1.3 |
|
java.lang.reflect
Provides classes and interfaces for obtaining
reflective information about classes and objects.
|
Java SE 6,
J2SE 5.0,
and
J2SDK 1.4 |
|
java.util
Provides the collections framework, formatted printing
and scanning, array manipulation utilities, event model, date and
time facilities, internationalization, and miscellaneous utility
classes.
|
Java SE 6,
J2SE 5.0, and
J2SDK 1.3
|
|
java.util.concurrent
java.util.concurrent.atomic
java.util.concurrent.locks
Provides utility classes used in concurrent
programming, including support for atomic updates of single
variables and a locking framework which supplements language-level
synchronization.
|
New in J2SE 5.0 |
|
java.util.jar
java.util.zip
Provides classes for reading and writing the standard
ZIP and GZIP file formats as well as the JAR (Java ARchive) file
format, which is based on the standard ZIP file format with an
optional manifest file.
|
Java SE 6 and
J2SDK 1.3 |
|
java.util.logging
Provides support to maintain and service software at
customer sites.
|
J2SE 5.0 and
J2SDK 1.4 |
|
java.util.regex
Provides classes for matching character sequences
against patterns specified by regular expressions.
|
New in J2SDK 1.4 |
|
java.util.prefs
Provides classes to store and retrieve user and system
preference and configuration data.
|
J2SDK 1.4 |
|
java.util.spi
Service provider classes for the java.util package.
Tutorials and Programmer's Guides
API Enhancements
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