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标签： num1 num2 int private answer new

import javax.swing.;
import java.awt.;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.*;

public class ArithmeticQuizGUI extends JFrame {
private static final int NUMBER_OF_QUESTIONS = 10;
private static final int TIME_LIMIT_PER_QUESTION = 30; // seconds
private List questions = new ArrayList<>();
private int currentQuestionIndex = 0;
private int correctAnswers = 0;
private int wrongAnswers = 0;
private JLabel questionLabel;
private JTextField answerField;
private JLabel timerLabel;
private Timer timer;
private int remainingTime;

public ArithmeticQuizGUI() {
    setTitle("Arithmetic Quiz");
    setSize(400, 200);
    setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    setLocationRelativeTo(null);

    // Generate questions
    generateQuestions();

    // Set up UI components
    JPanel panel = new JPanel(new GridLayout(3, 1));
    questionLabel = new JLabel("Loading question...");
    answerField = new JTextField();
    timerLabel = new JLabel("Time: " + TIME_LIMIT_PER_QUESTION);
    
    panel.add(questionLabel);
    panel.add(answerField);
    panel.add(timerLabel);
    
    add(panel);
    
    // Set up timer
    remainingTime = TIME_LIMIT_PER_QUESTION;
    timer = new Timer(1000, new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            remainingTime--;
            timerLabel.setText("Time: " + remainingTime);
            if (remainingTime <= 0) {
                showNextQuestion(false);
            }
        }
    });

    // Show first question
    showNextQuestion(true);

    // Handle answer submission
    answerField.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            checkAnswer();
        }
    });

    setVisible(true);
}

private void generateQuestions() {
    Set<String> uniqueQuestions = new HashSet<>();
    Random random = new Random();
    
    while (questions.size() < NUMBER_OF_QUESTIONS) {
        int type = random.nextInt(4); // 0: +, 1: -, 2: *, 3: /
        int num1 = random.nextInt(100) + 1; // 1 to 100
        int num2 = random.nextInt(100) + 1; // 1 to 100
        int answer = 0;
        String questionText = "";
        
        switch (type) {
            case 0: // Addition
                answer = num1 + num2;
                questionText = num1 + " + " + num2;
                break;
            case 1: // Subtraction
                if (num1 >= num2) {
                    answer = num1 - num2;
                    questionText = num1 + " - " + num2;
                }
                break;
            case 2: // Multiplication
                answer = num1 * num2;
                if (answer < 10000) {
                    questionText = num1 + " * " + num2;
                }
                break;
            case 3: // Division
                if (num2 != 0 && num1 % num2 == 0) {
                    answer = num1 / num2;
                    questionText = num1 + " / " + num2;
                }
                break;
        }
        
        if (!questionText.isEmpty() && uniqueQuestions.add(questionText)) {
            questions.add(new ArithmeticQuestion(questionText, answer));
        }
    }
}

private void showNextQuestion(boolean resetTimer) {
    if (currentQuestionIndex < questions.size()) {
        ArithmeticQuestion question = questions.get(currentQuestionIndex++);
        questionLabel.setText("Question: " + question.question);
        answerField.setText("");
        if (resetTimer) {
            remainingTime = TIME_LIMIT_PER_QUESTION;
            timerLabel.setText("Time: " + remainingTime);
            timer.restart();
        }
    } else {
        // Show results
        JOptionPane.showMessageDialog(this, "Quiz finished!\nCorrect Answers: " + correctAnswers +
                "\nWrong Answers: " + wrongAnswers +
                "\nAccuracy: " + ((double) correctAnswers / (correctAnswers + wrongAnswers)) * 100 + "%");
        System.exit(0);
    }
}

private void checkAnswer() {
    timer.stop();
    ArithmeticQuestion currentQuestion = questions.get(currentQuestionIndex - 1);
    try {
        int userAnswer = Integer.parseInt(answerField.getText());
        if (userAnswer == currentQuestion.answer) {
            correctAnswers++;
            JOptionPane.showMessageDialog(this, "Correct!");
        } else {
            wrongAnswers++;
            JOptionPane.showMessageDialog(this, "Wrong! Correct answer was: " + currentQuestion.answer);
        }
    } catch (NumberFormatException e) {
        JOptionPane.showMessageDialog(this, "Please enter a valid number.");
        wrongAnswers++;
    }
    showNextQuestion(true);
}

public static void main(String[] args) {
    SwingUtilities.invokeLater(new Runnable() {
        @Override
        public void run() {
            new ArithmeticQuizGUI();
        }
    });
}

}

class ArithmeticQuestion {
String question;
int answer;

ArithmeticQuestion(String question, int answer) {
    this.question = question;
    this.answer = answer;
}

}

标签：,num1,num2,int,private,answer,new
From： https://www.cnblogs.com/bixi/p/18442056