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Merge pull request #1420 from debugjoker/patch-3

Update Java集合框架常见面试题.md
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@ -135,7 +135,7 @@ Java 集合框架如下图所示:
**双向链表:** 包含两个指针,一个 prev 指向前一个节点,一个 next 指向后一个节点。 **双向链表:** 包含两个指针,一个 prev 指向前一个节点,一个 next 指向后一个节点。
> 另外推荐一篇把双向链表讲清楚的文章:[https://juejin.im/post/5b5d1a9af265da0f47352f14](https://juejin.im/post/5b5d1a9af265da0f47352f14) > 另外推荐一篇把双向链表讲清楚的文章:[https://juejin.cn/post/6844903648154271757](https://juejin.cn/post/6844903648154271757)
![双向链表](https://my-blog-to-use.oss-cn-beijing.aliyuncs.com/2019-6/双向链表.png) ![双向链表](https://my-blog-to-use.oss-cn-beijing.aliyuncs.com/2019-6/双向链表.png)