Web Reference: Jan 7, 2026 · In Java, the Map Interface is part of the java.util package and represents a collection of key-value pairs, where Keys should be unique, but values can be duplicated. It provides efficient retrieval, insertion, and deletion operations based on keys. Use Map classes when you need to store pairs of keys and values, like a name and its phone number. What's Next? In the next chapters, you will learn how to use each of these data structures in detail - how to add, remove, sort, and search elements, and choose the right structure for your task. The Java platform includes a collections framework that provides developers with a unified architecture for representing and manipulating collections, enabling them to be manipulated independently of the details of their representation.
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