Uses of Class

Packages that use Field 
Package Description
Provides classes that are fundamental to the design of the Java programming language.
The java.lang.invoke package provides low-level primitives for interacting with the Java Virtual Machine.
Provides utility classes to allow serializable mappings between SQL types and data types in the Java programming language.
Contains classes that make it more convenient for language runtimes to implement their own language-specific object models and type conversions by providing basic implementations of some classes as well as various utilities.