public class StartView extends JFrame {

     public StartView() {

         this.setTitle(" 复杂迷宫 ");

         this.setSize(240, 265);

         this.setLocationRelativeTo(null);

         this.setDefaultCloseOperation(EXIT_ON_CLOSE);

         this.setResizable(false);

         initialize();

         this.setVisible(true);

     }

     private void initialize() {

         JPanel contentPane = new JPanel();

         this.setContentPane(contentPane);

         contentPane.setLayout(null);

         JLabel widthLabel = new JLabel(" 迷宫长度： ");

         JLabel heightLabel = new JLabel(" 迷宫高度： ");

         JLabel levelLabel = new JLabel(" 难度 :");

         JTextField widthText = new JTextField();

         JTextField heightText = new JTextField();

         JRadioButton level1 = new JRadioButton("1");

         JRadioButton level2 = new JRadioButton("2");

         JRadioButton level3 = new JRadioButton("3");

         ButtonGroup levelGroup = new ButtonGroup();

         levelGroup.add(level1);

         levelGroup.add(level2);

         levelGroup.add(level3);

         JButton run = new JButton(" 生成迷宫 ");

         // 设定标签位置

         widthLabel.setBounds(20, 20, 100, 30);

         heightLabel.setBounds(20, 70, 110, 30);

         widthText.setBounds(120, 20, 70, 30);

         heightText.setBounds(120, 70, 70, 30);

         levelLabel.setBounds(20, 120, 60, 30);

         level1.setBounds(80, 120, 50, 30);

         level2.setBounds(130, 120, 50, 30);

         level3.setBounds(180, 120, 50, 30);

         run.setBounds(55, 170, 120, 30);

         // 限制输入框只接收数字

         widthText.setDocument(new NumberTextField());

         heightText.setDocument(new NumberTextField());

         // 改变字体

         Font font = new Font(" 楷体 ", Font.PLAIN, 17);

         widthLabel.setFont(font);

         heightLabel.setFont(font);

         widthText.setFont(font);

         heightText.setFont(font);

         levelLabel.setFont(font);

         level1.setFont(font);

         level2.setFont(font);

         level3.setFont(font);

         run.setFont(font);

         // 取消按钮选中边框

         level1.setFocusPainted(false);

         level2.setFocusPainted(false);

         level3.setFocusPainted(false);

         // 默认选择难度 3

         level3.setSelected(true);

         contentPane.add(widthLabel);

         contentPane.add(heightLabel);

         contentPane.add(widthText);

         contentPane.add(heightText);

         contentPane.add(levelLabel);

         contentPane.add(level1);

         contentPane.add(level2);

         contentPane.add(level3);

         contentPane.add(run);

         // 生成迷宫监听器

         run.addActionListener(e -> {

             // 建议宽在 10-90 ，长在 10-45 之间

             if (widthText.getText().equals("")) {

                 JOptionPane.showMessageDialog(null, " 长度不能为空！ ", " 提示 ", JOptionPane.INFORMATION_MESSAGE);

             } else if (heightText.getText().equals("")) {

                 JOptionPane.showMessageDialog(null, " 高度不能为空！ ", " 提示 ", JOptionPane.INFORMATION_MESSAGE);

             } else {

                 int width = Integer.parseInt(widthText.getText());

                 int height = 外汇跟单gendan5.comInteger.parseInt(heightText.getText());

                 if (width >= 10 && width <= 90 && height >= 10 && height <= 45) {

                     int level = level1.isSelected() ? 1 : level2.isSelected() ? 2 : 3;

                     MazeModel maze = new MazeModel(width, height, level);

                     this.dispose();

                     maze.draw();

                 } else {

                     JOptionPane.showMessageDialog(null, " 迷宫的长必须在 10-45 之间，宽必须在 10-90 之间，请检查输入是否有误！ ", " 错误输入 ", JOptionPane.ERROR_MESSAGE);

                 }

             }

         });

         // 添加回车键入监听器

         KeyAdapter enterAdapter = new KeyAdapter() {

             @Override

             public void keyPressed(KeyEvent e) {

                 if (e.getKeyCode() == KeyEvent.VK_ENTER) {

                     run.doClick();   // 回车即生成迷宫

                 }

             }

         };

         widthText.addKeyListener(enterAdapter);

         heightText.addKeyListener(enterAdapter);

     }

     public static void main(String[] args) {

         new StartView();

     }

}