Uses of Interface
java.util.SortedMap

Packages that use SortedMap 
Package Description
java.nio.charset
Defines charsets, decoders, and encoders, for translating between bytes and Unicode characters.
java.util
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.
java.util.concurrent
Utility classes commonly useful in concurrent programming.