ConcurrentHashMap ：底层原理结构

ConcurrentHashMap是一个并发安全的HashMap的实现。它在底层使用了数据、单向链表和红黑树来构建存储结构。初始化一个ConcurrentHashMap实例时，默认会创建一个长度为16的数组。当发生Hash冲突时，ConcurrentHashMap采用链式寻址的方式来解决冲突。在jdk1.8中引入了红黑树机制，当数组长度大于64且链表长度大于等于8时，链表会被转换成红黑树。而在动态扩容时，如果链表长度小于8，红黑树会退化成链表。这些设计和优化都是为了提高ConcurrentHashMap的性能和查询效率。 <span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* [【Java 基础】ConcurrentHashMap 底层原理](https://blog.csdn.net/qq_37967783/article/details/131095252)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
- *2* *3* [ConcurrentHashMap底层实现原理](https://blog.csdn.net/ahuangqingfeng/article/details/124269310)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_2"}}] [.reference_item style="max-width: 50%"]
[ .reference_list ]