通过java文件对数据库进行简单的增删改查 最基本的东西 没界面的 控制台运行类型-Java file on the database through a simple search of additions and deletions to the most basic things did not run the type of console interface

利用哈希表做个生命游戏，必须使用哈希表才可以的，是一个简单的控制台的java生命游戏，欢迎改进-Use a hash table to be a game of life, you must use a hash table can, is a simple java console Game of Life, welcomed the improved

门禁系统 适合初学者学习的 控制台java程序 代码简单功能明确-Access control system suitable for beginners to learn a simple function of the console java code explicitly