Explain the concept of Java collections framework.
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The Java Collections Framework is a comprehensive set of interfaces, implementations, and algorithms provided by Java to manipulate collections of objects. It offers a standardized way to work with groups of objects, such as lists, sets, maps, and queues, by providing interfaces like List, Set, Map, Queue, etc. These interfaces define common operations and behaviors for manipulating collections, such as adding, removing, searching, and iterating over elements. Implementations like ArrayList, LinkedList, HashSet, HashMap, and PriorityQueue provide concrete implementations of these interfaces. Additionally, the framework includes utility classes and algorithms to perform common tasks efficiently, promoting code reuse, consistency, and flexibility in Java programming.