这是我的代码:服务器:packageserver;publicclassMain{publicstaticvoidmain(Stringargs[]){newEchoServer(9000);}}+packageserver;importjava.io.BufferedReader;importjava.io.InputStreamReader;importjava.io.PrintWriter;importjava.net.ServerSocket;importjava.net.Socket;publicclassEchoServer{privateServerSocketserve