常见java数据结构的使用方法，包括Arrays类Collections类HashSet类List类TreeSet类Map类Vector类-Java data structures commonly used methods, including Arrays Class Collections category HashSet Class List Class TreeSet Class Map type Vector Class

直接引入 可以像int一样操作 跟Java里的好像 但好用多了 而且是加速版的，比用字符串写的还快(用vector<int>) 还附了些奇怪的函式 有兴趣自己写BigNumber的人可以参考看看 -Can be directly introduced to operate with the same as int in Java but it seems the more useful it is to speed up version of, than to

java实现双链表。首尾指针，可以循环获取数据，能弥补向量的不足。-java to achieve double-linked list. Inclusive pointer, you can cycle to obtain the data, you can make up for the lack of vector.