Java Collections Framework知识结构目录

最新推荐文章于 2023-07-24 11:29:04 发布

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原文链接：http://www.cnblogs.com/vimx86/p/6689394.html

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本文详细介绍了Java集合框架的两个主要接口树：Collection和Map。Collection包括Set、List和Queue等子接口，提供基本的集合操作；Map则用于键值对映射。文章还探讨了这些接口的具体功能和应用场景。

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The core collection interfaces are the foundation of the Java Collections Framework.

The Java Collections Framework hierarchy consists of two distinct interface trees:

The first tree starts with the Collection interface, which provides for the basic functionality used by all collections, such as add and remove methods. Its subinterfaces — Set, List, and Queue — provide for more specialized collections.
The Set interface does not allow duplicate elements. This can be useful for storing collections such as a deck of cards or student records. The Set interface has a subinterface, SortedSet, that provides for ordering of elements in the set.
The List interface provides for an ordered collection, for situations in which you need precise control over where each element is inserted. You can retrieve elements from a List by their exact position.
The Queue interface enables additional insertion, extraction, and inspection operations. Elements in a Queue are typically ordered in on a FIFO basis.
The Deque interface enables insertion, deletion, and inspection operations at both the ends. Elements in a Deque can be used in both LIFO and FIFO.
The second tree starts with the Map interface, which maps keys and values similar to a Hashtable.
Map's subinterface, SortedMap, maintains its key-value pairs in ascending order or in an order specified by a Comparator.