Uses of Interface

Packages that use BinaryOperator
Provides for system input and output through data streams, serialization and the file system.
Contains the collections framework, some internationalization support classes, a service loader, properties, random number generation, string parsing and scanning classes, base64 encoding and decoding, a bit array, and several miscellaneous utility classes.
A small toolkit of classes that support lock-free thread-safe programming on single variables.
Functional interfaces provide target types for lambda expressions and method references.
Classes to support functional-style operations on streams of elements, such as map-reduce transformations on collections.