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Java Collection

Last updated: Apr 3, 2026

Java Collection FAQ

https://javaguide.cn/java/collection/java-collection-questions-01.html
https://javaguide.cn/java/collection/java-collection-questions-02.html

how does java implement HashMap ?

Array + Linked list
https://juejin.cn/post/6985369345207566373#heading-7
https://lushunjian.github.io/blog/2019/01/02/HashMap的底层实现/
https://javaguide.cn/java/collection/java-collection-questions-02.html#hashmap-的底层实现
https://javaguide.cn/java/collection/hashmap-source-code.html#hashmap-常用方法测试

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