Java 多人聊天 源码

Java 多人聊天源码

1.ChatApplet.java类

import java.awt.*;

import java.awt.event.*;

import java.applet.*;

import javax.swing.*;

import yout.*;

import javax.swing.border.*;

import java.io.*;

import .*;

public class ChatApplet extends JApplet {

boolean isStandalone = false;

BorderLayout borderLayout1 = new BorderLayout();

Border border1;

JPanel jPanel2 = new JPanel();

Border border2;

BorderLayout borderLayout2 = new BorderLayout();

JPanel jPanel1 = new JPanel();

JButton buttonSend = new JButton();

BorderLayout borderLayout3 = new BorderLayout();

JPanel jPanel3 = new JPanel();

Border border3;

BorderLayout borderLayout4 = new BorderLayout();

JTextField textTalk = new JTextField();

JPanel jPanel4 = new JPanel();

Border border4;

BorderLayout borderLayout5 = new BorderLayout();

JScrollPane jScrollPane1 = new JScrollPane();

JTextArea textMessages = new JTextArea();

PrintWriter out = null;

/**Get a parameter value*/

public String getParameter(String key, String def) {

return isStandalone ? System.getProperty(key, def) :

(getParameter(key) != null ? getParameter(key) : def); }

/**Construct the applet*/

public ChatApplet() {

}

/**Initialize the applet*/

public void init() {

try {

jbInit();

Client client = new Client(this);

if (client.isConnected())

out = client.getOutputStream();

else

appendMessage("大大的错误！！");

}

catch(Exception e) {

e.printStackTrace();

}

}

/**Component initialization*/

private void jbInit() throws Exception {

border1 = BorderFactory.createEmptyBorder(9,9,9,9);

border2 = BorderFactory.createEmptyBorder(9,9,9,9);

border3 = BorderFactory.createEmptyBorder(2,0,2,5);

border4 = BorderFactory.createEmptyBorder(0,0,5,0);

this.setSize(new Dimension(400,300));

this.getContentPane().setLayout(borderLayout1);

jPanel2.setBorder(border2);

jPanel2.setLayout(borderLayout2);

buttonSend.setFocusPainted(false);

buttonSend.setText("发送");

buttonSend.addActionListener(new

java.awt.event.ActionListener() {

public void actionPerformed(ActionEvent e) {

buttonSend_actionPerformed(e);

}

});

jPanel1.setLayout(borderLayout3);

jPanel3.setBorder(border3);

jPanel3.setLayout(borderLayout4);

jPanel4.setBorder(border4);

jPanel4.setLayout(borderLayout5);

textTalk.addKeyListener(new java.awt.event.KeyAdapter() { public void keyPressed(KeyEvent e) {

textTalk_keyPressed(e);

}

});

this.getContentPane().add(jPanel2, BorderLayout.CENTER);