Provides classes that are fundamental to the design of the Javaprogramming language.

Provides classfile parsing, generation, and transformation library.

Contains the collections framework, some internationalization support classes,a service loader, properties, random number generation, string parsingand scanning classes, base64 encoding and decoding, a bit array, andseveral miscellaneous utility classes.

Classes to support functional-style operations on streams of elements, suchas map-reduce transformations on collections.

Provides the open data types and Open MBean descriptor classes.