Uses of Class

Packages that use AbstractCollection
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.
Utility classes commonly useful in concurrent programming.
Provides the core classes for the Java Management Extensions.
Provides the definition of the Relation Service.
Package javax.print.attribute.standard contains classes for specific printing attributes.