dialogdemo.java

java关于实现对话框的小程序

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: 对话框演示</p>
 * <p>Description: 全面的演示各种类型的对话框的使用</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 = "简单的信息提示对话窗";
    String iconDesc = "带有图标的对话窗";
    String moreDialogDesc = "复杂信息对话窗";
    CustomDialog customDialog;
/**
 *<br>方法说明：构造器，生成一个面板添加到JFrame中
 *<br>输入参数：
 *<br>返回类型：
 */
    public DialogDemo(JFrame frame) {
        super(new BorderLayout());
        this.frame = frame;
        customDialog = new CustomDialog(frame, "tom", this);
        customDialog.pack();

        //创建成员
        JPanel frequentPanel = createSimpleDialogBox();
        JPanel featurePanel = createFeatureDialogBox();
        JPanel iconPanel = createIconDialogBox();
        label = new JLabel("点击\"显示\" 按钮"
                           + " 显示一个选择的对话框",
                           JLabel.CENTER);

        //放置对象
        Border padding = BorderFactory.createEmptyBorder(20,20,5,20);
        frequentPanel.setBorder(padding);
        featurePanel.setBorder(padding);
        iconPanel.setBorder(padding);
        //创建选项卡
        JTabbedPane tabbedPane = new JTabbedPane();
        tabbedPane.addTab("简单对话窗", null,
                          frequentPanel,
                          simpleDialogDesc); 
        tabbedPane.addTab("复杂对话窗", null,
                          featurePanel,
                          moreDialogDesc);
        tabbedPane.addTab("图标对话窗", null,
                          iconPanel,
                          iconDesc);

        add(tabbedPane, BorderLayout.CENTER);
        add(label, BorderLayout.PAGE_END);
        label.setBorder(BorderFactory.createEmptyBorder(10,10,10,10));
    }
/**
 *<br>方法说明：设置按钮上的文字
 *<br>输入参数：String newText 添加的文字
 *<br>返回类型：
 */
    void setLabel(String newText) {
        label.setText(newText);
    }
/**
 *<br>方法说明：获取图片
 *<br>输入参数：String path 图片完整路径和名字
 *<br>返回类型：ImageIcon 图片对象
 */
    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>方法说明：创建一个JPanel，给第一个选项卡
 *<br>输入参数：
 *<br>返回类型：
 */
    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";
        //添加单选到数字
        radioButtons[0] = new JRadioButton("只有“OK”按钮");
        radioButtons[0].setActionCommand(defaultMessageCommand);

        radioButtons[1] = new JRadioButton("有“Yes/No”二个按钮");
        radioButtons[1].setActionCommand(yesNoCommand);

        radioButtons[2] = new JRadioButton("有“Yes/No”两个按钮 "
                      + "(程序添加文字)");
        radioButtons[2].setActionCommand(yeahNahCommand);

        radioButtons[3] = new JRadioButton("有“Yes/No/Cancel”三个按钮 "
                           + "(程序添加文字)");
        radioButtons[3].setActionCommand(yncCommand);
        //将四个单选组成一个群
        for (int i = 0; i < numButtons; i++) {
            group.add(radioButtons[i]);
        }
        //设置第一个为默认选择
        radioButtons[0].setSelected(true);
        //定义“显示”按钮
        showItButton = new JButton("显示");
        //给“显示”按钮添加监听
        showItButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String command = group.getSelection().getActionCommand();

                //ok对话窗
                if (command == defaultMessageCommand) {
                    JOptionPane.showMessageDialog(frame,
                                "鸡蛋不可能是绿色的！");

                //yes/no 对话窗
                } else if (command == yesNoCommand) {
                    int n = JOptionPane.showConfirmDialog(
                            frame, "你喜欢吃酸菜鱼吗?",
                            "一个很无聊的问题！！",
                            JOptionPane.YES_NO_OPTION);
                    if (n == JOptionPane.YES_OPTION) {//选择yes
                        setLabel("哇！我也是！");
                    } else if (n == JOptionPane.NO_OPTION) {//选择no
                        setLabel("唉！我喜欢吃！");
                    } else {
                        setLabel("快告诉我吧！");
                    }

                //yes/no (自己输入选项)
                } else if (command == yeahNahCommand) {
                    Object[] options = {"是的", "不喜欢"};
                    int n = JOptionPane.showOptionDialog(frame,
                                    "你喜欢酸菜鱼吗?",
                                    "又一个无聊的问题！",
                                    JOptionPane.YES_NO_OPTION,
                                    JOptionPane.QUESTION_MESSAGE,
                                    null,
                                    options,
                                    options[0]);
                    if (n == JOptionPane.YES_OPTION) {
                        setLabel("你哄人的吧，我也喜欢。");
                    } else if (n == JOptionPane.NO_OPTION) {
                        setLabel("其实我也不喜欢！");
                    } else {
                        setLabel("这都不肯告诉我，小气鬼！");
                    }

                //yes/no/cancel 对话框
                } else if (command == yncCommand) {
                    Object[] options = {"是的，给我来一份。",
                                        "不，谢谢！",
                                        "不，我要水煮鱼！"};
                    //构造对话框
                    int n = JOptionPane.showOptionDialog(frame,
                                    "先生！我们这里有鲜美的酸菜鱼，您需要吗？",
                                    "服务生的问题。",
                                    JOptionPane.YES_NO_CANCEL_OPTION,
                                    JOptionPane.QUESTION_MESSAGE,
                                    null,
                                    options,
                                    options[2]);
                    if (n == JOptionPane.YES_OPTION) {
                        setLabel("你要的酸菜鱼来了！");
                    } else if (n == JOptionPane.NO_OPTION) {
                        setLabel("好的，你需要其它的。");
                    } else if (n == JOptionPane.CANCEL_OPTION) {
                        setLabel("好的，我们给你做水煮鱼！");
                    } else {
                        setLabel("对不起！你还没有点菜呢！");
                    }
                }
                return;
            }
        });

        return createPane(simpleDialogDesc + ":",
                          radioButtons,
                          showItButton);
    }
/**
 *<br>方法说明：提供给createSimpleDialogBox和createFeatureDialogBox方法
 *<br>方法说明：创建带提示信息、一列单选框和“显示”按钮
 *<br>输入参数：String description 提示帮助信息
 *<br>输入参数：JRadioButton[] radioButtons 单选框组
 *<br>输入参数：JButton showButton “显示”按钮
 *<br>返回类型：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>方法说明：提供给createSimpleDialogBox和createFeatureDialogBox方法
 *<br>方法说明：创建带提示信息、二列单选框和“显示”按钮
 *<br>输入参数：String description 提示帮助信息
 *<br>输入参数：JRadioButton[] radioButtons 单选框组
 *<br>输入参数：JButton showButton “显示”按钮
 *<br>返回类型：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>方法说明：创建第三个选项卡的面板
 *<br>方法说明：这里都是实现showMessageDialog类，但是也可以指定图标
 *<br>输入参数：
 *<br>返回类型：JPanel 构造好的面板
 */

    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（没有图标）");
        radioButtons[0].setActionCommand(plainCommand);

        radioButtons[1] = new JRadioButton("信息图标");
        radioButtons[1].setActionCommand(infoCommand);

        radioButtons[2] = new JRadioButton("问题图标");