java重写窗口的叉点击_求助 java 如何编写JFrame窗体右上角红色打叉关闭按钮的事件？...

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import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import java.io.BufferedReader;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.net.Socket;

import javax.swing.JFrame;

import javax.swing.JScrollPane;

import javax.swing.JTextArea;

import javax.swing.JTextField;

public class Client {

JTextArea jta;

JTextField jtf;

BufferedReader in;

PrintWriter out;

private void initGUI(){

JFrame f = new JFrame("Client");

f.setSize(400,300);

f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

jta = new JTextArea();

jta.setEditable(false);

f.add(new JScrollPane(jta));

jtf = new JTextField();

f.add(jtf,"South");

f.setVisible(true);

jtf.addActionListener(new ActionListener() {

public void actionPerformed(ActionEvent e) {

String text = jtf.getText();

jtf.setText("");

out.println(text);

out.flush();

}

});

}

private void initNet(){

try{

Socket s = new Socket("127.0.0.1",8186);

out = new PrintWriter(s.getOutputStream());

in = new BufferedReader(new InputStreamReader(s.getInputStream()));

}catch(Exception e){

e.printStackTrace();

}

}

private void receive(){

try{

while(true){

String str = in.readLine();

if(str==null){

return;

}

jta.append("˵"+str+"n");

}

}catch(Exception e){

e.printStackTrace();

}

}

private Client(){

this.initGUI();

this.initNet();

}

public static void main(String[] args) {

Client c = new Client();

c.receive();

}

}

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.net.ServerSocket;

import java.net.Socket;

import java.util.ArrayList;

import java.util.List;

public class Server {

public static void main(String[] args) {

try{

ServerSocket ss = new ServerSocket(8186);

List sockets = new ArrayList();

while(true){

Socket s = ss.accept();

sockets.add(s);

Thread t1 = new ChatThread(s,sockets);

t1.start();

}

}catch(IOException e){

e.printStackTrace();

}

}

}

class ChatThread extends Thread{

Socket s;

List sockets;

public ChatThread(Socket s,List sockets){

this.s = s;

this.sockets = sockets;

}

public void run(){

try{

BufferedReader in = new BufferedReader(new InputStreamReader(s.getInputStream()));

while(true){

String str = in.readLine();

for(int i=0;i

Socket s2 = (Socket)sockets.get(i);

PrintWriter out = new PrintWriter(s2.getOutputStream());

out.println(str);

out.flush();

}

}

}catch (Exception e) {}

finally{

try{

s.close();

}catch (Exception e) {}

}

}

}