程序员世界大冒险d22

今天上了Java课，老师让生成对话框，不怎么会，该学学的，下面是代码：
import java.util.Random;
import javax.swing.;
import java.awt.;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

class Method {
public String[][] generateQuestions() {
Random rand = new Random();
String[] questions = new String[30];
String[] answers = new String[30];

    for (int i = 0; i < 30; i++) {
        int fushu = rand.nextInt(100);
        int m = rand.nextInt(100) - fushu;
        int n = rand.nextInt(100) - fushu;
        int q = rand.nextInt(100);
        int o = rand.nextInt(4);
        int p = rand.nextInt(10); // 更改此处以限制范围

        switch (o) {
            case 0: // 加法
                questions[i] = n > 0 ? m + "+" + n + "=" : m + "" + n + "=";
                answers[i] = String.valueOf(m + n);
                break;
            case 1: // 减法
                questions[i] = m + "-" + q + "=";
                answers[i] = String.valueOf(m - q);
                break;
            case 2: // 乘法
                int multiplier, multiplicand;
                do {
                    multiplier = rand.nextInt(10) + 1; // 单个乘数范围 [1, 10]
                    multiplicand = rand.nextInt(10) + 1; // 单个乘数范围 [1, 10]
                } while (multiplier * multiplicand > 999);

                questions[i] = multiplier + "*" + multiplicand + "=";
                answers[i] = String.valueOf(multiplier * multiplicand);
                break;
            case 3: // 除法
                int dividend;
                do {
                    dividend = rand.nextInt(100);
                    int divisor = rand.nextInt(99) + 1; // g can't be 0
                    if (dividend % divisor == 0) {
                        questions[i] = dividend + "/" + divisor + "=";
                        answers[i] = String.valueOf(dividend / divisor);
                        break;
                    }
                } while (true);
                break;
        }
    }
    return new String[][]{questions, answers}; // 返回问题和答案
}

}

public class Math4 {
public static void main(String[] args) {
Method method = new Method();
String[][] questionsAndAnswers = method.generateQuestions();
String[] questions = questionsAndAnswers[0];
String[] answers = questionsAndAnswers[1];

    // 创建自定义的JFrame
    JFrame frame = new JFrame("整数四则运算测试");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(400, questions.length * 50 + 150); // 根据问题数量动态设置高度
    frame.setLayout(new GridLayout(questions.length + 1, 2)); // 多一行用于倒计时显示

    // 添加问题和输入框到帧中
    JTextField[] answerFields = new JTextField[questions.length]; // 保存所有答案文本框
    for (int i = 0; i < questions.length; i++) {
        JLabel questionLabel = new JLabel(questions[i]);
        answerFields[i] = new JTextField(15);
        frame.add(questionLabel);
        frame.add(answerFields[i]);
    }

    // 添加倒计时标签
    JLabel timerLabel = new JLabel("剩余时间: 30 秒");
    frame.add(timerLabel);

    // 创建提交按钮
    JButton submitButton = new JButton("提交所有答案");
    frame.add(submitButton); // 将按钮添加到框架

    // 提交按钮的动作事件
    submitButton.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            StringBuilder answersResult = new StringBuilder();
            int correctCount = 0;
            int incorrectCount = 0;

            for (int i = 0; i < questions.length; i++) {
                String userAnswer = answerFields[i].getText();
                if (userAnswer.equals(answers[i])) {
                    correctCount++;
                } else {
                    incorrectCount++;
                    answersResult.append(questions[i] + " 正确答案: " + answers[i] + "\n");
                }
            }

            JOptionPane.showMessageDialog(frame,
                    "正确数量: " + correctCount + "\n" +
                            "错误数量: " + incorrectCount + "\n" +
                            "错误详情:\n" + answersResult.toString(),
                    "提交的答案",
                    JOptionPane.INFORMATION_MESSAGE);
        }
    });

    // 倒计时逻辑
    final int countdownTime = 120; // 倒计时秒数
    Timer timer = new Timer(1000, new ActionListener() {
        int timeLeft = countdownTime;

        @Override
        public void actionPerformed(ActionEvent e) {
            if (timeLeft > 0) {
                timerLabel.setText("剩余时间: " + timeLeft + " 秒");
                timeLeft--;
            } else {
                ((Timer) e.getSource()).stop();
                JOptionPane.showMessageDialog(frame, "时间到！", "提示", JOptionPane.INFORMATION_MESSAGE);
                // 禁用文本框和按钮
                for (Component component : frame.getContentPane().getComponents()) {
                    if (component instanceof JTextField) {
                        component.setEnabled(false);
                    }
                }
                submitButton.setEnabled(false);
            }
        }
    });

    frame.setVisible(true); // 显示框架
    timer.start(); // 启动计时器
}

}