package org.jetic.web.chat;import java.awt.*;import java.awt.event.*;import java.applet.*;import javax.swing.*;import com.borland.jbcl.layout.*;import javax.swing.border.*;import java.io.*;import java.net.*;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("大大的錯誤！！");        }        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("發(fā)  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);        jPanel2.add(jPanel1, BorderLayout.SOUTH);        jPanel1.add(buttonSend, BorderLayout.EAST);        jPanel1.add(jPanel3, BorderLayout.CENTER);        jPanel3.add(textTalk, BorderLayout.CENTER);        jPanel2.add(jPanel4, BorderLayout.CENTER);        jPanel4.add(jScrollPane1, BorderLayout.CENTER);        jScrollPane1.getViewport().add(textMessages, null);    }    /**Get Applet information*/    public String getAppletInfo() {        return "Applet Information";    }    /**Get parameter info*/    public String[][] getParameterInfo() {        return null;    }    /**Main method*/    public static void main(String[] args) {        ChatApplet applet = new ChatApplet();        applet.isStandalone = true;        JFrame frame = new JFrame();        //EXIT_ON_CLOSE == 3        frame.setDefaultCloseOperation(3);        frame.setTitle("Applet Frame");        frame.getContentPane().add(applet, BorderLayout.CENTER);        applet.init();        applet.start();        frame.setSize(400,320);        Dimension d = Toolkit.getDefaultToolkit().getScreenSize();        frame.setLocation((d.width - frame.getSize().width) / 2, (d.height - frame.getSize().height) / 2);        frame.setVisible(true);    }    //static initializer for setting look & feel    static {        try {            UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());            //UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName());        }        catch(Exception e) {        }    }    public void appendMessage(String message) {        textMessages.setText(message + textMessages.getText());    }    void buttonSend_actionPerformed(ActionEvent e) {        String msg;        msg = textTalk.getText().trim();        if (msg.equals("") || msg == null)  return;        out.println(textTalk.getText());        textTalk.setText("");    }    void textTalk_keyPressed(KeyEvent e) {        if (e.getKeyChar() != '\n') return;        out.println(textTalk.getText());        textTalk.setText("");    }}