关于Java网络编程问题

Server端

import java.net.*;

import java.io.*;

public class TestServer extends Thread{

private ServerSocket serverSocket;

public TestServer(int port) throws IOException {

serverSocket = new ServerSocket(port);

serverSocket.setSoTimeout(10000);

}

public void run()

  {

     while(true)

     {

        try

        {

           System.out.println("等待远程连接，端口号为：" + serverSocket.getLocalPort() + "...");

           Socket server = serverSocket.accept();

           System.out.println("远程主机地址：" + server.getRemoteSocketAddress());

           DataInputStream in = new DataInputStream(server.getInputStream());

           System.out.println(in.readUTF());

           DataOutputStream out = new DataOutputStream(server.getOutputStream());

           out.writeUTF("谢谢连接我：" + server.getLocalSocketAddress() + "\nGoodbye!");

           server.close();

        }catch(SocketTimeoutException s)

        {

           System.out.println("Socket timed out!");

           break;

        }catch(IOException e)

        {

           e.printStackTrace();

           break;

        }

     }

  }

public static void main(String[] args) {

int port = Integer.parseInt("6066"); 

try {

Thread thread = new TestServer(port);      //class继承了Thread类

thread.run();

} catch (IOException e) {

e.printStackTrace();

        }

    }

}

Client端

import java.net.*;

import java.io.*;

public class TestClient {

public static void main(String[] args) {

String serverName = "localhost";

     int port = Integer.parseInt("6066");

     try

     {

        System.out.println("连接到主机：" + serverName + " ，端口号：" + port);

        Socket client = new Socket(serverName, port);

        System.out.println("远程主机地址：" + client.getRemoteSocketAddress());

        OutputStream outToServer = client.getOutputStream();

        DataOutputStream out = new DataOutputStream(outToServer);

        out.writeUTF("Hello from " + client.getLocalSocketAddress());

        InputStream inFromServer = client.getInputStream();

        DataInputStream in = new DataInputStream(inFromServer);

        System.out.println("服务器响应： " + in.readUTF());

        client.close();

     }catch(IOException e)

     {

        e.printStackTrace();

     }

}

}