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){} } } } }
时间: 2024-10-11 00:39:28