java垃圾分类答题系统随机抽题有图形化界面，代码实现

以下是一个简单的 Java 垃圾分类答题系统，其中包含随机抽题和图形化界面。代码如下：

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class GarbageSortingQuiz extends JFrame implements ActionListener {

    private static final long serialVersionUID = 1L;
    private JButton startButton, nextButton, submitButton;
    private JPanel quizPanel, resultPanel;
    private JLabel questionLabel, resultLabel;
    private JRadioButton option1, option2, option3, option4;
    private ButtonGroup optionsGroup;
    private String[][] quizData = {{"Which of the following is a biodegradable waste?", "Plastic bags", "Food waste", "Aluminum cans", "Glass bottles", "2"},
                                   {"Which of the following is an example of hazardous waste?", "Old newspapers", "Used batteries", "Cardboard boxes", "Empty soda cans", "2"},
                                   {"Which of the following is a type of recyclable waste?", "Styrofoam cups", "Plastic straws", "Metal cans", "Cotton balls", "3"},
                                   {"Which of the following is a non-biodegradable waste?", "Vegetable peels", "Eggshells", "Napkins", "Plastic bottles", "4"},
                                   {"Which of the following is a type of e-waste?", "Old books", "Broken toys", "Used cell phones", "Empty milk jugs", "3"}};
    private int currentQuestion = 0;
    private int score = 0;

    public GarbageSortingQuiz() {
        setTitle("Garbage Sorting Quiz");
        setSize(500, 300);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        startButton = new JButton("Start Quiz");
        startButton.addActionListener(this);
        nextButton = new JButton("Next");
        nextButton.addActionListener(this);
        submitButton = new JButton("Submit");
        submitButton.addActionListener(this);

        quizPanel = new JPanel(new GridLayout(6, 1));
        quizPanel.add(new JLabel(""));
        questionLabel = new JLabel("");
        quizPanel.add(questionLabel);
        option1 = new JRadioButton("");
        option2 = new JRadioButton("");
        option3 = new JRadioButton("");
        option4 = new JRadioButton("");
        optionsGroup = new ButtonGroup();
        optionsGroup.add(option1);
        optionsGroup.add(option2);
        optionsGroup.add(option3);
        optionsGroup.add(option4);
        quizPanel.add(option1);
        quizPanel.add(option2);
        quizPanel.add(option3);
        quizPanel.add(option4);

        resultPanel = new JPanel(new GridLayout(2, 1));
        resultPanel.add(new JLabel(""));
        resultLabel = new JLabel("");
        resultPanel.add(resultLabel);

        add(startButton);

        setVisible(true);
    }

    public void actionPerformed(ActionEvent e) {

        if (e.getSource() == startButton) {
            add(quizPanel);
            remove(startButton);
            currentQuestion = 0;
            score = 0;
            showQuestion();
            add(nextButton);
            validate();
        }

        if (e.getSource() == nextButton) {
            if (currentQuestion < quizData.length - 1) {
                if (checkAnswer()) score++;
                currentQuestion++;
                showQuestion();
            } else {
                if (checkAnswer()) score++;
                showResult();
            }
        }

        if (e.getSource() == submitButton) {
            if (checkAnswer()) score++;
            showResult();
        }
    }

    public void showQuestion() {
        questionLabel.setText(quizData[currentQuestion][0]);
        option1.setText(quizData[currentQuestion][1]);
        option2.setText(quizData[currentQuestion][2]);
        option3.setText(quizData[currentQuestion][3]);
        option4.setText(quizData[currentQuestion][4]);
        optionsGroup.clearSelection();
    }

    public boolean checkAnswer() {
        if (option1.isSelected() && quizData[currentQuestion][5].equals("1")) return true;
        if (option2.isSelected() && quizData[currentQuestion][5].equals("2")) return true;
        if (option3.isSelected() && quizData[currentQuestion][5].equals("3")) return true;
        if (option4.isSelected() && quizData[currentQuestion][5].equals("4")) return true;
        return false;
    }

    public void showResult() {
        remove(quizPanel);
        remove(nextButton);
        remove(submitButton);
        resultLabel.setText("You scored " + score + " out of " + quizData.length);
        add(resultPanel);
        validate();
    }

    public static void main(String[] args) {
        new GarbageSortingQuiz();
    }
}

该程序使用了 Swing 库来创建图形化界面。在主方法中，创建了一个 GarbageSortingQuiz 对象，该对象在构造函数中设置了程序的标题和大小，并创建了开始按钮。在 actionPerformed 方法中，为开始按钮、下一题按钮和提交按钮添加了事件监听器。当开始按钮被点击时，会创建出一个包含问题和选项的面板，并将开始按钮从程序中移除。当下一题按钮被点击时，会检查前一题的答案是否正确，并显示下一题。当提交按钮被点击时，会检查最后一题的答案是否正确，并显示得分。showQuestion 方法用于显示当前的问题和选项，checkAnswer 方法用于检查选中的选项是否正确，showResult 方法用于显示最终得分。