Java collections tutorial: Learn lists, maps and more

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Many data structures have been developed so programmers can store and retrieve values efficiently. The Java API provides implementations of common data structures and algorithms, as well as a framework to organize them. In this free PDF download, you will learn how to work with lists, sets, maps and other collections.

Key points:

  1. The Collection interface provides common methods for all collections, except for maps which are described by the Map interface.
  2. A list is a sequential collection in which each element has an integer index.
  3. A set is optimized for efficient containment testing. Java provides HashSet and TreeSet implementations.
  4. For maps, you have the choice between HashMap and TreeMap implementations. A LinkedHashMap retains insertion order.
  5. The Collection interface and Collections class provide many useful algorithms: set operations, searching, sorting, shuffling and more.
  6. Views provide access to data stored elsewhere using the standard collection interfaces.

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