服务器端
package socket;
import java.awt.Color;
import java.awt.BorderLayout;
import java.awt.event.*;
import javax.swing.*;
import java.io.*;
import java.net.*;
class ClientWorker implements Runnable {
private Socket client;
private JTextArea textArea;
ClientWorker(Socket client, JTextArea textArea) {
this.client = client;
this.textArea = textArea;
}
public void run(){
String line;
BufferedReader in = null;
PrintWriter out = null;
try{
in = new BufferedReader(new InputStreamReader(client.getInputStream()));
out = new PrintWriter(client.getOutputStream(), true);
} catch (IOException e) {
System.out.println("in or out failed");
System.exit(-1);
}
while(true){
try{
line = in.readLine();
//Send data back to client
out.println(line);
textArea.append(line);
} catch (IOException e) {
System.out.println("Read failed");
System.exit(-1);
}
}
}
}
class SocketThrdServer extends JFrame{
JLabel label = new JLabel("Text received over socket:");
JPanel panel;
JTextArea textArea = new JTextArea();
ServerSocket server = null;
SocketThrdServer(){ //Begin Constructor
panel = new JPanel();
panel.setLayout(new BorderLayout());
panel.setBackground(Color.white);
getContentPane().add(panel);
panel.add("North", label);
panel.add("Center", textArea);
} //End Constructor
/**
* In this example the listenSocket method loops on the server.accept call waiting for client connections
* and creates an instance of the ClientWorker class for each client connection it accepts.
* The textArea component that displays the text received from the client connection is passed to the ClientWorker
* instance with the accepted client connection.
*/
public void listenSocket(){
try{
server = new ServerSocket(4444);
} catch (IOException e) {
System.out.println("Could not listen on port 4444");
System.exit(-1);
}
while(true){
ClientWorker w;
try{
w = new ClientWorker(server.accept(), textArea);
Thread t = new Thread(w);
t.start();
} catch (IOException e) {
System.out.println("Accept failed: 4444");
System.exit(-1);
}
}
}
protected void finalize(){
//Objects created in run method are finalized when
//program terminates and thread exits
try{
server.close();
} catch (IOException e) {
System.out.println("Could not close socket");
System.exit(-1);
}
}
public static void main(String[] args){
SocketThrdServer frame = new SocketThrdServer();
frame.setTitle("Server Program");
WindowListener l = new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
};
frame.addWindowListener(l);
frame.pack();
frame.setVisible(true);
frame.listenSocket();
}
}
