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合作课程
- 地牢独行-类元气骑士俯视角射击游戏教程
- 原创独立游戏制作：类星露谷
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- 【E世界】MMORPG全栈式网络游戏开发之旅-入门篇
- 其他
课程介绍
- Java核心
- HashMap
- hashmap 底层的数据结构
- 为什么引入红黑树
- 链表和红黑树转换的条件
- 为什么链表转红黑树的阈值是 8
- 为什么红黑树转回链表阈值是6而不是8呢
- HashMap 重要属性，及他们的作用
- threshold 除了存放扩容阈值外还有其他作用吗
- Hash 的默认容量是多少？容量有什么限制？
- loadFactor 默认的负载因子是多少，为什么是这个值？
- HashMap 的容量为什么要是2的N次方
- 说说HashMap 的插入的流程
- 说说HashMap resize 的过程
- 红黑树和链表在resize 过程中通过 hash & aldcap == 0 定位，这么做的原理
- HashMap 是如何计算key的hash值的 （1.8）
- 为什么用hashcode 的高16做异或运算
- HashMap 是线程安全的吗
- HashMap 的死循环问题
- 总结下JDK 在1.8对HashMap做了哪些优化
- 线程池
目录
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