程序以端4441建立与客户端的套接字连接,服务器端收到客户端的申请后,以客户的套接字建立一个线程,并启动。如果没有客户申请,则继续监听客户的申请。线程按客户的套接字建立输入数据流in和输数据流out。线程利用in读取客户放入线路里的信息。如果接受的信息是“结束”,则服务器回复“结束”后关闭套接字连接;否则回复:“我是服务器你对我说“,以及服务器接收到的信息。
import java.net.*;
import java.io.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.applet.*;
public class Aclient extends Applet implements Runnable,ActionListener{
JButton button; JTextField textF; JTextArea textA;
Socket socket; Thread thread;
DataInputStream in; DataOutputStream out;
public void init(){
setBackground(new Color(120,153,137));
setLayout(new BorderLayout());
Button = new JButton(“发送信息”);
textF = new JTextField(20);
textA = new JTextArea(20,30);
setSize(450,350);
JPanel p = new JPanel();
p.add(textF); p.add(button);
add(textA,”Center”); add(p,”South”);
button.addActionListener(this);
}
public void start(){
try{
socket = new Socket(this.getCodeBase().getHost(),4441);
in = new DataInputStream(socket.getInputStream());
out = new DataOutputStream(socket.getOutputStream());
}catch(IOException e){}
if(thread==null){
thread = new Thread(this);
thread.setPriority(Thread.MIN_PRIORITY);
thread.start();
}
}
public void run(){
String s = null;
while(true){
try{
s = in.readUTF();
}catch(IOException e){}
if(s.equals(“结束”)){
try{
socket.close();break;
}catch(IOException e){}
}else texA.append(s + “\n”);
}
}
public void actionPerformed(ActionEvent e){
if(e.getSource()==button){
String s = textF.getText();
if(s! = null){
try{
out.writeUTF(s);
}catch(IOException e1){}
}
else{
try{
out.writeUTF(“请说话”);
}catch(IOException e1){}
}
}
}
}
原文:http://blog.csdn.net/qq_27073205/article/details/45874109