📄 votedialog.java
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import javax.swing.*;import java.awt.*;import java.awt.event.*;public class VoteDialog extends JPanel { JLabel label; JFrame frame; String simpleDialogDesc = "候选人"; //构造函数 public VoteDialog(JFrame frame) { this.frame = frame; JLabel title; // 创建组件 JPanel choicePanel = createSimpleDialogBox(); System.out.println("passed createSimpleDialogBox"); title = new JLabel("请您首先选择一个候选人，然后" + "单击\"投票\" 按钮", JLabel.CENTER); label = new JLabel("现在投票！", JLabel.CENTER); label.setBorder(BorderFactory.createEmptyBorder(10,10,10,10)); choicePanel.setBorder(BorderFactory.createEmptyBorder(20,20,5,20)); // 设置布局 setLayout(new BorderLayout()); add(title, BorderLayout.NORTH); add(label, BorderLayout.SOUTH); add(choicePanel, BorderLayout.CENTER); } void setLabel(String newText) { label.setText(newText); } private JPanel createSimpleDialogBox() { final int numButtons = 4; JRadioButton[] radioButtons = new JRadioButton[numButtons]; final ButtonGroup group = new ButtonGroup(); JButton voteButton = null; final String defaultMessageCommand = "default"; final String yesNoCommand = "yesno"; final String yeahNahCommand = "yeahnah"; final String yncCommand = "ync"; radioButtons[0] = new JRadioButton("<html>1号候选人：<font color=red>小王</font></html>"); radioButtons[0].setActionCommand(defaultMessageCommand); radioButtons[1] = new JRadioButton("<html>2号候选人：<font color=green>小张</font></html>"); radioButtons[1].setActionCommand(yesNoCommand); radioButtons[2] = new JRadioButton("<html>3号候选人：<font color=blue>小李</font></html>"); radioButtons[2].setActionCommand(yeahNahCommand); radioButtons[3] = new JRadioButton("<html>4号候选人：<font color=maroon>小刘</font></html>"); radioButtons[3].setActionCommand(yncCommand); for (int i = 0; i < numButtons; i++) { group.add(radioButtons[i]); } // 设置默认：选择第一个按钮 radioButtons[0].setSelected(true); voteButton = new JButton("投票"); voteButton.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { String command = group.getSelection().getActionCommand(); // ok 对话框 if (command == defaultMessageCommand) { JOptionPane.showMessageDialog(frame, "该候选人是坏蛋，投票无效！"); // yes/no 对话框 } else if (command == yesNoCommand) { int n = JOptionPane.showConfirmDialog( frame, "该候选人是一个傀儡 \n您还坚持给她投票吗？", "确认信息；", JOptionPane.YES_NO_OPTION); if (n == JOptionPane.YES_OPTION) { setLabel("好的，请注意您的收入。"); } else if (n == JOptionPane.NO_OPTION) { setLabel("哇塞！选的好。"); } else { setLabel("投票是您神圣的职责！"); } // yes/no 对话框(自定义) } else if (command == yeahNahCommand) { Object[] options = {"是的，我投票", "不,我不投票"}; int n = JOptionPane.showOptionDialog(frame, "该候选人已经逝世，\n您还坚持投他一票吗？", "确认信息：", JOptionPane.YES_NO_OPTION, JOptionPane.QUESTION_MESSAGE, null, options, options[0]); if (n == JOptionPane.YES_OPTION) { setLabel("我希望您不要对这个候选人有过多的指望。"); } else if (n == JOptionPane.NO_OPTION) { setLabel("哇塞！选的好！"); } else { setLabel("投票是您神圣的职责！"); } // yes/no/cancel 对话框(自定义) } else if (command == yncCommand) { Object[] options = {"是的！", "不，我要弃权", "让我想一想"}; int n = JOptionPane.showOptionDialog(frame, "小刘不想参加，您还" + "坚持投他一票吗？", "确认信息：", JOptionPane.YES_NO_CANCEL_OPTION, JOptionPane.QUESTION_MESSAGE, null, options, options[2]); if (n == JOptionPane.YES_OPTION) { setLabel("优秀的选票。"); } else if (n == JOptionPane.NO_OPTION) { setLabel("不管怎么说，这是您的选择。"); } else if (n == JOptionPane.CANCEL_OPTION) { setLabel("我当然不能强迫您投票。"); } else { setLabel("投票是您神圣的职责！"); } } return; } }); System.out.println("calling createPane"); return createPane(simpleDialogDesc + ":", radioButtons, voteButton); } 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.Y_AXIS)); box.add(label); for (int i = 0; i < numChoices; i++) { box.add(radioButtons[i]); } JPanel pane = new JPanel(); pane.setLayout(new BorderLayout()); pane.add(box, BorderLayout.NORTH); pane.add(showButton, BorderLayout.SOUTH); System.out.println("returning pane"); return pane; } public static void main(String[] args) { JFrame frame = new JFrame("投票对话框"); Container contentPane = frame.getContentPane(); contentPane.setLayout(new GridLayout(1,1)); contentPane.add(new VoteDialog(frame)); // 当关闭窗口时，退出 frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.pack(); frame.setVisible(true); }}⌨️ 快捷键说明
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