完成Java课堂测试；
import javax.swing.;
import java.awt.;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Random;
public class Question extends JFrame {
private JPasswordField[] password = new JPasswordField[30];
private int[] answer = new int[30];
private Random rand = new Random();
private double rightnum = 0;
private JLabel timerLabel;
private int timeLeft = 60;
private Timer timer;
public Question() {setTitle("四则运算");setSize(600, 500);setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);setLocationRelativeTo(null);setLayout(new GridLayout(8, 10)); // Adjust grid size to fit timerint i = 0;int[] x = new int[30];int[] y = new int[30];int[] z = new int[30];while (i < 30) {x[i] = rand.nextInt(90) + 10;y[i] = rand.nextInt(90) + 10;z[i] = rand.nextInt(4);if (z[i] == 0 && judgeSame(x, y, z, i)) { // Additionanswer[i] = x[i] + y[i];add(new JLabel(x[i] + " + " + y[i] + " ="));password[i] = new JPasswordField();password[i].setSize(50,20);add(password[i]);i++;}else if (z[i] == 1 && judgeSame(x, y, z, i)) { // Subtractionif (x[i] >= y[i]) {answer[i] = x[i] - y[i];add(new JLabel(x[i] + " - " + y[i] + " ="));password[i] = new JPasswordField();password[i].setSize(50,20);add(password[i]);i++;}}else if (z[i] == 2 && judgeSame(x, y, z, i)) { // Multiplicationif (x[i] * y[i] < 1000) {answer[i] = x[i] * y[i];add(new JLabel(x[i] + " * " + y[i] + " ="));password[i] = new JPasswordField();add(password[i]);i++;}}else if (z[i] == 3 && judgeSame(x, y, z, i)) {if (y[i] != 0 && (x[i] / y[i]) * y[i] == x[i]) {answer[i] = x[i] / y[i];add(new JLabel(x[i] + " / " + y[i] + " ="));password[i] = new JPasswordField();add(password[i]);i++;}}}JButton confirm = new JButton("查看得分");confirm.addActionListener(e -> {calculateScore();});add(confirm);timerLabel = new JLabel("剩余时间: " + timeLeft + " 秒", SwingConstants.CENTER);add(timerLabel);timer = new Timer(1000, new ActionListener() {public void actionPerformed(ActionEvent e) {timeLeft--;timerLabel.setText("剩余时间: " + timeLeft + " 秒");if (timeLeft <= 0) {timer.stop();disableInputs();calculateScore();}}});timer.start();
}private void disableInputs() {for (JPasswordField pass : password) {pass.setEnabled(false);}
}public boolean judgeSame(int[] x, int[] y, int[] z, int i) {for (int j = 0; j < i; j++) {if (x[i] == x[j] && y[i] == y[j] && z[i] == z[j]) return false;}return true;
}public boolean judgeAnswer(int answer, JPasswordField password) {String a = String.valueOf(answer);return password.getText().equals(a);
}private void calculateScore() {rightnum = 0;for (int i = 0; i < password.length; i++) {if (judgeAnswer(answer[i], password[i])) {rightnum++;}}JOptionPane.showMessageDialog(this, "你的得分是: " + rightnum + "/" + password.length);
}
}
import javax.swing.*;
public class text {
public static void main(String[] args) {
SwingUtilities.invokeLater(() -> {
Question frame = new Question();
frame.setVisible(true);
});
}
}
