我只需要比较givenanswers的答案和questions中每个问题的正确答案，然后返回失败问题列表。我想知道我怎么能对兰达斯做同样的事。

private List<Question> checkAnswer(List<Answer> givenAnswers, List<Question> questions){
    List<Question> failedQuestions = new ArrayList<>();

    for(int i=0; i<givenAnswers.size(); i++){
        if(!givenAnswers.get(i).toString().equalsIgnoreCase(questions.get(i)
                                                    .getCorrectAnswer().toString()))
            failedQuestions.add(questions.get(i));
    }

    return failedQuestions;
}

以下是答案类的代码：

public class Answer {
private final String content;

public Answer(String content) {
    this.content = content;
}

@Override
public String toString() {
    return content;
}

}
还有问题课：

public class Question {
private final int id;
private final String content;
private final List<Answer> answerList;
private final Answer correctAnswer;

public Question(int id, String content, List<Answer> answerList, Answer correctAnswer) {
    this.id = id;
    this.content = content;
    this.answerList = answerList;
    this.correctAnswer = correctAnswer;
}

public int getId() {
    return id;
}

public String getContent() {
    return content;
}

public List<Answer> getAnswerList() {
    return answerList;
}

public Answer getCorrectAnswer(){
    return correctAnswer;
}

@Override
public String toString() {
    StringBuilder answersInLine = new StringBuilder();

    for (Answer answer : answerList) {
        answersInLine.append(answer.toString()).append('\t');
    }

    return "Question " + id +
            ":\n" + content +
            '\n' + answersInLine.toString() + '\n';
}

}
有什么简单的解决办法吗？