获取当前电脑正在使用的网卡ip,mac,使用java编写，导入eclipse即可(Access to the current computer is using the network card IP, MAC, using java to write, import eclipse)

简单的java程序编写的登录界面，可以实现账号密码注册功能，卡已实现账号密码登录功能。(The login interface written by a simple java program can realize the registration function of the account password, and the card has already realized the login function of the account password.)

JCOP good for development for java card