关于UDP中PINGER的客户端代码，可以马上运行。-The following code fully implements a ping server. You need to compile and run this code. You should study this code carefully, as it will help you write your Ping client.

udp pinger实验 作为服务器程序-udp pinger experiment as a server program

socket java ping机制 服务端实现代码-socket java pingServer

It is a pingserver for java(inetaddress isreachable method) (isreachable method connects to port 7.)-It is a pingserver for java(inetaddress isreachable method) (isreachable method connects to port 7.)