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Lostecho 1cd5bb460f clear old record
2023-09-10 10:50:53 +08:00

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有序的 Collectins, 元素可重复，可通过下标获取元素

ArrayList，基于数组实现，增删慢，查询快，线程安全效率低

LinkedList，基于链表实现，增删快，查询慢

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