用Socket编程，读服务器几个字符，再写入本地显示

package com.zhangry.interview.java.socket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;

public class Server {
private ServerSocket ss;
private Socket socket;
private BufferedReader in;
private PrintWriter out;
public Server(){
try {
ss = new ServerSocket(8888);
while(true){
socket = ss.accept();
String remoteIP =  socket.getInetAddress().getHostAddress();
String remotePort = ":"+socket.getLocalPort();
System.out.println("客户端接入 ! IP :"+remoteIP+remotePort);
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
String line = in .readLine();
System.out.println("客户端说 :"+ line);
out= new PrintWriter(socket.getOutputStream(),true);
out.println("你的信息已收到!");
out.close();
in.close();
socket.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}

public static void main(String[] args){
new Server();
}
}

package com.zhangry.interview.java.socket;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;

public class Client {
Socket socket;
BufferedReader in;
PrintWriter out;
public Client(){
try {
System.out.println("Try to connect to 127.0.0.1:8888");
socket = new Socket("127.0.0.1",8888);
System.out.println("已经成功连接至服务器");
System.out.println("请输入要发向服务器的话:");
BufferedReader line = new BufferedReader(new InputStreamReader(System.in));
out = new PrintWriter(socket.getOutputStream(),true);
out.println(line.readLine());
in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
System.out.println(in.readLine());
out.close();
in.close();
socket.close();
} catch (UnknownHostException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}

public static void main(String[] args){
new Client();
}
}