简单java实现哈希表，对哈希表进行插入查找删除操作-Simple java implementation hash table lookup on the hash table to insert delete operation

数据库填补数据工具，提供数据库特定表的查找删除功能-Database to fill data tool that offers -specific table lookup delete function

链表和树的遍历查找 链表的反转 合并链表 查找单链表中的倒数第K个结点 不允许用长度(Linked list and tree traversal lookup, linked list inversion and merge list lookup. The countdown K node in single chain table is not allowed to use length.)