import java.awt.Component;import java.awt.GridLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.util.Date;import javax.swing.BorderFactory;import javax.swing.Box;import javax.swing.BoxLayout;import javax.swing.ButtonGroup;import javax.swing.Icon;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JRadioButton;import javax.swing.border.EtchedBorder;import javax.swing.border.TitledBorder;public class JOptionPaneTest{    private JFrame jf = new JFrame("测试JOptionPane");    //定义6个面板,分别用于定义对话框的几种选项    private ButtonPanel messagePanel;    private ButtonPanel messageTypePanel;    private ButtonPanel msgPanel;    private ButtonPanel confirmPanel;    private ButtonPanel optionsPanel;    private ButtonPanel inputPanel;    private String messageString = "消息区内容";    private Icon messageIcon = new ImageIcon("ico/heart.png");    private Object messageObject = new Date();    private Component messageComponent = new JButton("组件消息");    private JButton msgBn = new JButton("消息对话框");    private JButton confirmBn = new JButton("确认对话框");    private JButton inputBn = new JButton("输入对话框");    private JButton optionBn = new JButton("选项对话框");        public void init()    {        JPanel top = new JPanel();        top.setBorder(new TitledBorder(new EtchedBorder(),"对话框的通用选项",TitledBorder.CENTER,TitledBorder.TOP));        top.setLayout(new GridLayout(1,2));        //消息类型Panel,该Panel中的选项决定对话框的图标        messageTypePanel = new ButtonPanel("选择消息的类型",new String[]{"ERROR_MESSAGE","INFORMATION_MESSAGE","WARNING_MESSAGE","QUESTION_MESSAGE","PLAIN_MESSAGE"});        //消息内容类型Panel,该Panel中的选项决定对话框消息区的内容        messagePanel = new ButtonPanel("选择消息内容的类型",new String[]{"字符串消息","图标消息","组件消息","普通对象消息","Object[]消息"});        top.add(messageTypePanel);        top.add(messagePanel);                JPanel bottom = new JPanel();        bottom.setBorder(new TitledBorder(new EtchedBorder(),"弹出不同的对话框",TitledBorder.CENTER,TitledBorder.TOP));        bottom.setLayout(new GridLayout(1,4));        //创建用于弹出消息对话框的Panel        msgPanel = new ButtonPanel("消息对话框",null);        msgBn.addActionListener(new ShowAction());        msgPanel.add(msgBn);                //创建用于弹出确认对话框的Panel        confirmPanel = new ButtonPanel("消息 对话框",new String[]{"DEFAULT_OPTION","YES_NO_OPTION","YES_NO_CANCEL_OPTION","OK_CANCEL_OPTION"});        confirmBn.addActionListener(new ShowAction());        confirmPanel.add(confirmBn);                //创建用于弹出输入对话框的Panel        inputPanel = new ButtonPanel("输入对话框",new String[]{"单行文本框","下拉列表选择框"});        inputBn.addActionListener(new ShowAction());        inputPanel.add(inputBn);                //创建用于弹出选项对话框的Panel        optionsPanel = new ButtonPanel("选项对话框",new String[]{"字符串选项","图标选项","对象选项"});        optionBn.addActionListener(new ShowAction());        optionsPanel.add(optionBn);                bottom.add(msgPanel);        bottom.add(confirmPanel);        bottom.add(inputPanel);        bottom.add(optionsPanel);                Box box = new Box(BoxLayout.Y_AXIS);        box.add(top);        box.add(bottom);        jf.add(box);        jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        jf.pack();        jf.setVisible(true);    }        //根据用户选择返回选项类型    private int getOptionType()    {        switch(confirmPanel.getSelection())        {            case "DEFAULT_OPTION":                return JOptionPane.DEFAULT_OPTION;            case "YES_NO_OPTION":                return JOptionPane.YES_NO_OPTION;            case "YES_NO_CANCEL_OPTION":                return JOptionPane.YES_NO_CANCEL_OPTION;            default:                return JOptionPane.OK_CANCEL_OPTION;        }    }        //根据用户选择返回消息    private Object getMessage()    {        switch(messagePanel.getSelection())        {            case "字符串消息":                return messageString;            case "图标消息":                return messageIcon;            case "组件消息":                return messageComponent;            case "普通对象消息":                return messageObject;            default:                return new Object[]{messageString,messageIcon,messageComponent,messageObject};        }    }        //根据用户选择返回消息类型(决定图标区的图标)    private int getDialogType()    {        switch(messageTypePanel.getSelection())        {            case "ERROR_MESSAGE":                return JOptionPane.ERROR_MESSAGE;            case "INFORMATION_MESSAGE":                return JOptionPane.INFORMATION_MESSAGE;            case "WARNING_MESSAGE":                return JOptionPane.WARNING_MESSAGE;            case "QUESTION_MESSAGE":                return JOptionPane.QUESTION_MESSAGE;            default:                return JOptionPane.PLAIN_MESSAGE;        }    }        private Object[] getOption()    {        switch(optionsPanel.getSelection())        {            case "字符串选项":                return new String[]{"a","b","c","d"};            case "图标选项":                return new Icon[]{new ImageIcon("ico/1.gif"),                                  new ImageIcon("ico/2.gif"),                                  new ImageIcon("ico/3.gif"),                                  new ImageIcon("ico/4.gif")};            default:                return new Object[]{new Date(),new Date(),new Date()};        }    }        //为各按钮定义事件监听器    private class ShowAction implements ActionListener    {        @Override        public void actionPerformed(ActionEvent event)        {            switch(event.getActionCommand())            {                case "确认对话框":                    JOptionPane.showConfirmDialog(jf, getMessage(),"确认对话框",getOptionType(),getDialogType());                    break;                case "输入对话框":                    if(inputPanel.getSelection().equals("单行文本框"))                    {                        JOptionPane.showInputDialog(jf,getMessage(),"输入对话框",getDialogType());                    }                    else                    {                        JOptionPane.showInputDialog(jf,getMessage(),"输入对话框",getDialogType());                    }                    break;                case "消息对话框":                    JOptionPane.showMessageDialog(jf, getMessage(),"消息对话框",getDialogType());                    break;                case "选项对话框":                    JOptionPane.showOptionDialog(jf, getMessage(), "选项对话框", getOptionType(), getDialogType(), null, getOption(), "a");                    break;            }        }    }        public static void main(String[] args)    {        new JOptionPaneTest().init();    }}//定义一个JPanel类扩展类,该类的对象包含多个纵向排列的//JRadioButton控件,且Panel扩展类可以指定一个字符串作为TitledBorderclass ButtonPanel extends JPanel{    private ButtonGroup group;        /**     * 功能:带参数构造函数     * @param title     * @param options     */    public ButtonPanel(String title,String[] options)    {        setBorder(BorderFactory.createTitledBorder(BorderFactory.createEtchedBorder(),title));        setLayout(new BoxLayout(this,BoxLayout.Y_AXIS));        group = new ButtonGroup();                for(int i = 0;options != null && i < options.length;i++)        {            JRadioButton b = new JRadioButton(options[i]);            b.setActionCommand(options[i]);            add(b);            group.add(b);            b.setSelected(i == 0);        }    }        //定义一个方法,用于返回用户选择的选项    public String getSelection()    {        return group.getSelection().getActionCommand();    }}