Web Reference: 4 days ago · Java provides collection interfaces like List, Set, Map, and Queue, with ready-made classes such as ArrayList, HashSet, HashMap, and PriorityQueue, so you don’t have to write data-handling code from scratch. Use List classes when you care about order, you may have duplicates, and want to access elements by index. Use Set classes when you need to store unique values only. Collection interfaces: Represent different types of collections, such as sets, lists, and maps. These interfaces form the basis of the framework. General-purpose implementations: Primary implementations of the collection interfaces.
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