java 中，socket学习

package tt;

import java.io.*;
import java.net.*;

public class Server {
    public static void main(String args[]) {
        ServerSocket server = null;
        Socket you = null;
        DataOutputStream out = null;
        DataInputStream in = null;
        try {
            server = new ServerSocket(4331);
        } catch (IOException e) {
            System.out.println("ERROR:" + e);
        }
        try {
            you = server.accept();
            in = new DataInputStream(you.getInputStream());
            out = new DataOutputStream(you.getOutputStream());
            while (true) {
                int m = 0;
                m = in.readInt();
                out.writeUTF("你说的数对应的字符是" + (char) m);
                System.out.println("服务器收到:" + m);
                Thread.sleep(500);
            }

            

        } catch (IOException e) {
            System.out.print("" + e);

        } catch (InterruptedException e) {

        }

    }
}