请按照下列要求利用java知识完善代码并保证正确运行： 定义问题类public class Question private int id; private String text; private String optionA; private String optionB; private String optionC; private String op

完善的代码如下：

// 导入Scanner类 import java.util.Scanner;

// 定义问题类 public class Question { private int id; private String text; private String[] options; private String answer;

public Question(int id, String text, String[] options, String answer) {
    this.id = id;
    this.text = text;
    this.options = options;
    this.answer = answer;
}

// getter和setter方法
public int getId() {
    return id;
}

public void setId(int id) {
    this.id = id;
}

public String getText() {
    return text;
}

public void setText(String text) {
    this.text = text;
}

public String[] getOptions() {
    return options;
}

public void setOptions(String[] options) {
    this.options = options;
}

public String getAnswer() {
    return answer;
}

public void setAnswer(String answer) {
    this.answer = answer;
}

}

// 定义测验类 public class Quiz { private List questions; private int totalQuestions; private int correctAnswers;

public Quiz(List<Question> questions) {
    this.questions = questions;
    this.totalQuestions = questions.size();
    this.correctAnswers = 0;
}

// 显示问题
public void showQuestion(Question question) {
    System.out.println("问题编号：" + question.getId());
    System.out.println("问题文本：" + question.getText());
    String[] options = question.getOptions();
    for (int i = 0; i < options.length; i++) {
        System.out.println("选项" + (char) ('A' + i) + "：" + options[i]);
    }
}

// 开始测验
public void startQuiz() {
    Scanner scanner = new Scanner(System.in);

    // 遍历问题列表
    for (Question question : questions) {
        // 显示问题并等待用户输入答案
        showQuestion(question);
        System.out.print("请输入您的答案（A/B/C/D）：");
        String answer = scanner.nextLine().toUpperCase();

        // 检查答案是否正确
        if (answer.equals(question.getAnswer())) {
            System.out.println("恭喜您，回答正确！");
            correctAnswers++;
        } else {
            System.out.println("很遗憾，回答错误。正确答案是：" + question.getAnswer());
        }
    }

    // 显示测验结果
    System.out.println("测验结束！");
    System.out.println("总问题数：" + totalQuestions);
    System.out.println("正确的问题数：" + correctAnswers);
    System.out.println("不正确的问题数：" + (totalQuestions - correctAnswers));
    System.out.println("百分比：" + (correctAnswers * 100.0 / totalQuestions) + "%");
}

}

// 在主函数中使用测验类 public static void main(String[] args) { // 初始化问题列表 List questions = new ArrayList<>(); questions.add(new Question(1, "问题1", new String[]{"选项A", "选项B", "选项C", "选项D"}, "A")); questions.add(new Question(2, "问题2", new String[]{"选项A", "选项B", "选项C", "选项D"}, "B")); questions.add(new Question(3, "问题3", new String[]{"选项A", "选项B", "选项C", "选项D"}, "C")); questions.add(new Question(4, "问题4", new String[]{"选项A", "选项B", "选项C", "选项D"}, "D")); // ...

// 创建测验对象并开始测验
Quiz quiz = new Quiz(questions);
quiz.startQuiz();