LinkedList随机删除和插入的效率应该是比较高的 #5
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LinkedList随机删除和插入的效率应该是比较高的，只是进行指针的操作，相比于ArrayList拷贝数组的操作效率高不少。
| LinkedList在JDK1.7以后取消了循环而改为双向链表，它的插入操作和删除仅仅做了指针的修改。所以效率应该是很高的。 |
| 不好意思 哪里我打错了 笔误 |
Snailclimb pushed a commit that referenced this pull request Oct 25, 2019
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LinkedList随机删除和插入的效率应该是比较高的，只是进行指针的操作，相比于ArrayList拷贝数组的操作效率高不少。