UDP点对点聊天是一个UDP的点对点聊天程序，程序运行测试的时候，需要改变侦听端口，如果要在同一台机器上测试，需要改变一下程序设置，因为程序比较简单，所以没有增加设置功能，读者可以在自己程序中修改。-UDP is a peer-to-peer chat UDP peer-to-peer chat program, run the test, when a need to change the listening port, if the same machine tests, procedures need to change settings, because the procedure is relatively simple, there is no increase setting function, readers can modify their own procedures.