Uses of Interface
java.lang.Appendable

Packages that use Appendable 
Package Description
java.io
Provides for system input and output through data streams, serialization and the file system.
java.lang
Provides classes that are fundamental to the design of the Java programming language.
java.nio
Defines buffers, which are containers for data, and provides an overview of the other NIO packages.
java.rmi.server
Provides classes and interfaces for supporting the server side of RMI.
java.time.format
Provides classes to print and parse dates and times.
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.