一个用UDP实现的网络聊天工具，利用UDP打洞技术实现了跨局域网的消息发送功能。-A UDP network chat tool, using UDP hole punching technology across the LAN to send a message.

自己写的一个基于Java的远程控制程序，基于UDP通信，现在只能在内网中实现，还没有实现UDP打洞技术。-You write a Java-based remote control program, based on UDP traffic, and now only including network, there is no UDP hole punching technology.