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JDK1.7、8 已经修改为双向链表
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notes/Java 容器.md

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@@ -212,7 +212,7 @@ private void writeObject(java.io.ObjectOutputStream s)
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### 4. 和 LinkedList 的区别
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- ArrayList 基于动态数组实现,LinkedList 基于双向循环链表实现
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- ArrayList 基于动态数组实现,LinkedList 基于双向链表实现
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- ArrayList 支持随机访问,LinkedList 不支持;
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- LinkedList 在任意位置添加删除元素更快。
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