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### Java 集合概览

Java 集合, 也叫作容器,主要是由两大接口派生而来:一个是 `Collecton`接口,主要用于存放单一元素;另一个是 `Map` 接口,主要用于存放键值对。对于`Collection` 接口,下面又有三个主要的子接口:`List`、`Set` 和 `Queue`。
Java 集合, 也叫作容器,主要是由两大接口派生而来:一个是 `Collection`接口,主要用于存放单一元素;另一个是 `Map` 接口,主要用于存放键值对。对于`Collection` 接口,下面又有三个主要的子接口:`List`、`Set` 和 `Queue`。

Java 集合框架如下图所示:

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