import javax.swing.JOptionPane;import javax.swing.JDialog;import javax.swing.JButton;import javax.swing.JRadioButton;import javax.swing.ButtonGroup;import javax.swing.JLabel;import javax.swing.ImageIcon;import javax.swing.BoxLayout;import javax.swing.Box;import javax.swing.BorderFactory;import javax.swing.border.Border;import javax.swing.JTabbedPane;import javax.swing.JPanel;import javax.swing.JFrame;import java.beans.*; import java.awt.*;import java.awt.event.*;/** * <p>Title: 對話框演示</p> * <p>Description: 全面的演示各種類型的對話框的使用</p> * <p>Copyright: Copyright (c) 2003</p> * <p>Filename: DialogDemo.java</p> * @author 杜江 * @version 1.0 */public class DialogDemo extends JPanel {    JLabel label;    ImageIcon icon = createImageIcon("images/middle.gif");    JFrame frame;    String simpleDialogDesc = "簡單的信息提示對話窗";    String iconDesc = "帶有圖標的對話窗";    String moreDialogDesc = "復雜信息對話窗";    CustomDialog customDialog;/** *<br>方法說明：構造器，生成一個面板添加到JFrame中 *<br>輸入參數： *<br>返回類型： */    public DialogDemo(JFrame frame) {        super(new BorderLayout());        this.frame = frame;        customDialog = new CustomDialog(frame, "tom", this);        customDialog.pack();        //創建成員        JPanel frequentPanel = createSimpleDialogBox();        JPanel featurePanel = createFeatureDialogBox();        JPanel iconPanel = createIconDialogBox();        label = new JLabel("點擊\"顯示\" 按鈕"                           + " 顯示一個選擇的對話框",                           JLabel.CENTER);        //放置對象        Border padding = BorderFactory.createEmptyBorder(20,20,5,20);        frequentPanel.setBorder(padding);        featurePanel.setBorder(padding);        iconPanel.setBorder(padding);        //創建選項卡        JTabbedPane tabbedPane = new JTabbedPane();        tabbedPane.addTab("簡單對話窗", null,                          frequentPanel,                          simpleDialogDesc);         tabbedPane.addTab("復雜對話窗", null,                          featurePanel,                          moreDialogDesc);        tabbedPane.addTab("圖標對話窗", null,                          iconPanel,                          iconDesc);        add(tabbedPane, BorderLayout.CENTER);        add(label, BorderLayout.PAGE_END);        label.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));    }/** *<br>方法說明：設置按鈕上的文字 *<br>輸入參數：String newText 添加的文字 *<br>返回類型： */    void setLabel(String newText) {        label.setText(newText);    }/** *<br>方法說明：獲取圖片 *<br>輸入參數：String path 圖片完整路徑和名字 *<br>返回類型：ImageIcon 圖片對象 */    protected static ImageIcon createImageIcon(String path) {        java.net.URL imgURL = DialogDemo.class.getResource(path);        if (imgURL != null) {            return new ImageIcon(imgURL);        } else {            System.err.println("Couldn't find file: " + path);            return null;        }    }/** *<br>方法說明：創建一個JPanel，給第一個選項卡 *<br>輸入參數： *<br>返回類型： */    private JPanel createSimpleDialogBox() {        final int numButtons = 4;        JRadioButton[] radioButtons = new JRadioButton[numButtons];        final ButtonGroup group = new ButtonGroup();        JButton showItButton = null;        final String defaultMessageCommand = "default";        final String yesNoCommand = "yesno";        final String yeahNahCommand = "yeahnah";        final String yncCommand = "ync";        //添加單選到數字        radioButtons[0] = new JRadioButton("只有“OK”按鈕");        radioButtons[0].setActionCommand(defaultMessageCommand);        radioButtons[1] = new JRadioButton("有“Yes/No”二個按鈕");        radioButtons[1].setActionCommand(yesNoCommand);        radioButtons[2] = new JRadioButton("有“Yes/No”兩個按鈕 "                      + "(程序添加文字)");        radioButtons[2].setActionCommand(yeahNahCommand);        radioButtons[3] = new JRadioButton("有“Yes/No/Cancel”三個按鈕 "                           + "(程序添加文字)");        radioButtons[3].setActionCommand(yncCommand);        //將四個單選組成一個群        for (int i = 0; i < numButtons; i++) {            group.add(radioButtons[i]);        }        //設置第一個為默認選擇        radioButtons[0].setSelected(true);        //定義“顯示”按鈕        showItButton = new JButton("顯示");        //給“顯示”按鈕添加監聽        showItButton.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent e) {                String command = group.getSelection().getActionCommand();                //ok對話窗                if (command == defaultMessageCommand) {                    JOptionPane.showMessageDialog(frame,                                "雞蛋不可能是綠色的！");                //yes/no 對話窗                } else if (command == yesNoCommand) {                    int n = JOptionPane.showConfirmDialog(                            frame, "你喜歡吃酸菜魚嗎?",                            "一個很無聊的問題！！",                            JOptionPane.YES_NO_OPTION);                    if (n == JOptionPane.YES_OPTION) {//選擇yes                        setLabel("哇！我也是！");                    } else if (n == JOptionPane.NO_OPTION) {//選擇no                        setLabel("唉！我喜歡吃！");                    } else {                        setLabel("快告訴我吧！");                    }                //yes/no (自己輸入選項)                } else if (command == yeahNahCommand) {                    Object[] options = {"是的", "不喜歡"};                    int n = JOptionPane.showOptionDialog(frame,                                    "你喜歡酸菜魚嗎?",                                    "又一個無聊的問題！",                                    JOptionPane.YES_NO_OPTION,                                    JOptionPane.QUESTION_MESSAGE,                                    null,                                    options,                                    options[0]);                    if (n == JOptionPane.YES_OPTION) {                        setLabel("你哄人的吧，我也喜歡。");                    } else if (n == JOptionPane.NO_OPTION) {                        setLabel("其實我也不喜歡！");                    } else {                        setLabel("這都不肯告訴我，小氣鬼！");                    }                //yes/no/cancel 對話框                } else if (command == yncCommand) {                    Object[] options = {"是的，給我來一份。",                                        "不，謝謝！",                                        "不，我要水煮魚！"};                    //構造對話框                    int n = JOptionPane.showOptionDialog(frame,                                    "先生！我們這里有鮮美的酸菜魚，您需要嗎？",                                    "服務生的問題。",                                    JOptionPane.YES_NO_CANCEL_OPTION,                                    JOptionPane.QUESTION_MESSAGE,                                    null,                                    options,                                    options[2]);                    if (n == JOptionPane.YES_OPTION) {                        setLabel("你要的酸菜魚來了！");                    } else if (n == JOptionPane.NO_OPTION) {                        setLabel("好的，你需要其它的。");                    } else if (n == JOptionPane.CANCEL_OPTION) {                        setLabel("好的，我們給你做水煮魚！");                    } else {                        setLabel("對不起！你還沒有點菜呢！");                    }                }                return;            }        });        return createPane(simpleDialogDesc + ":",                          radioButtons,                          showItButton);    }/** *<br>方法說明：提供給createSimpleDialogBox和createFeatureDialogBox方法 *<br>方法說明：創建帶提示信息、一列單選框和“顯示”按鈕 *<br>輸入參數：String description 提示幫助信息 *<br>輸入參數：JRadioButton[] radioButtons 單選框組 *<br>輸入參數：JButton showButton “顯示”按鈕 *<br>返回類型：JPanel 添加好的面板 */    private JPanel createPane(String description,                              JRadioButton[] radioButtons,                              JButton showButton) {        int numChoices = radioButtons.length;        JPanel box = new JPanel();        JLabel label = new JLabel(description);        box.setLayout(new BoxLayout(box, BoxLayout.PAGE_AXIS));        box.add(label);        //添加radio        for (int i = 0; i < numChoices; i++) {            box.add(radioButtons[i]);        }        JPanel pane = new JPanel(new BorderLayout());        pane.add(box, BorderLayout.PAGE_START);        pane.add(showButton, BorderLayout.PAGE_END);        return pane;    }/** *<br>方法說明：提供給createSimpleDialogBox和createFeatureDialogBox方法 *<br>方法說明：創建帶提示信息、二列單選框和“顯示”按鈕 *<br>輸入參數：String description 提示幫助信息 *<br>輸入參數：JRadioButton[] radioButtons 單選框組 *<br>輸入參數：JButton showButton “顯示”按鈕 *<br>返回類型：JPanel 添加好的面板 */     private JPanel create2ColPane(String description,                                  JRadioButton[] radioButtons,                                  JButton showButton) {        JLabel label = new JLabel(description);        int numPerColumn = radioButtons.length/2;        JPanel grid = new JPanel(new GridLayout(0, 2));        for (int i = 0; i < numPerColumn; i++) {            grid.add(radioButtons[i]);            grid.add(radioButtons[i + numPerColumn]);        }        JPanel box = new JPanel();        box.setLayout(new BoxLayout(box, BoxLayout.PAGE_AXIS));        box.add(label);        grid.setAlignmentX(0.0f);        box.add(grid);        JPanel pane = new JPanel(new BorderLayout());        pane.add(box, BorderLayout.PAGE_START);        pane.add(showButton, BorderLayout.PAGE_END);        return pane;    }/** *<br>方法說明：創建第三個選項卡的面板 *<br>方法說明：這里都是實現showMessageDialog類，但是也可以指定圖標 *<br>輸入參數： *<br>返回類型：JPanel 構造好的面板 */    private JPanel createIconDialogBox() {        JButton showItButton = null;        final int numButtons = 6;        JRadioButton[] radioButtons = new JRadioButton[numButtons];        final ButtonGroup group = new ButtonGroup();        final String plainCommand = "plain";        final String infoCommand = "info";        final String questionCommand = "question";        final String errorCommand = "error";        final String warningCommand = "warning";        final String customCommand = "custom";        radioButtons[0] = new JRadioButton("普通（沒有圖標）");        radioButtons[0].setActionCommand(plainCommand);        radioButtons[1] = new JRadioButton("信息圖標");        radioButtons[1].setActionCommand(infoCommand);        radioButtons[2] = new JRadioButton("問題圖標");