hashMap详解 https://juejin.im/post/5dee6f54f265da33ba5a79c8

深入浅出，非常不错 https://juejin.im/post/5df8d7346fb9a015ff64eaf9

转自掘金，写的非常不错的文章https://juejin.im/post/5df360c9e51d45581a709fab?utm_source...