Uses of Interface
java.util.Iterator

Packages that use Iterator 
Package Description
com.sun.jdi.event
This package defines JDI events and event processing.
com.sun.source.util
Provides utilities for operations on abstract syntax trees (AST).
java.applet
Provides the classes necessary to create an applet and the classes an applet uses to communicate with its applet context.
java.awt.dnd
Drag and Drop is a direct manipulation gesture found in many Graphical User Interface systems that provides a mechanism to transfer information between two entities logically associated with presentation elements in the GUI.
java.beans.beancontext
Provides classes and interfaces relating to bean context.
java.lang
Provides classes that are fundamental to the design of the Java programming language.
java.nio.charset.spi
Service-provider classes for the java.nio.charset package.
java.nio.file
Defines interfaces and classes for the Java virtual machine to access files, file attributes, and file systems.
java.security.cert
Provides classes and interfaces for parsing and managing certificates, certificate revocation lists (CRLs), and certification paths.
java.sql
Provides the API for accessing and processing data stored in a data source (usually a relational database) using the Java™ programming language.
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.
java.util.stream
Classes to support functional-style operations on streams of elements, such as map-reduce transformations on collections.
javax.imageio
The main package of the Java Image I/O API.
javax.imageio.spi
A package of the Java Image I/O API containing the plug-in interfaces for readers, writers, transcoders, and streams, and a runtime registry.
javax.tools
Provides interfaces for tools which can be invoked from a program, for example, compilers.
javax.xml.crypto
Common classes for XML cryptography.
javax.xml.crypto.dom
DOM-specific classes for the javax.xml.crypto package.
javax.xml.namespace
Defines XML Namespace processing.
javax.xml.stream
Defines interfaces and classes for the Streaming API for XML (StAX).
javax.xml.stream.events
Defines event interfaces for the Streaming API for XML (StAX).
javax.xml.stream.util
Provides utility classes for the Streaming API for XML (StAX).
javax.xml.xpath
Provides an object-model neutral API for the evaluation of XPath expressions and access to the evaluation environment.