如何避免在Java测验应用中出现重复问题

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

public class QuizQuestionSelector {

    private List<String> quizQuestions; // 假设这是一个包含所有问题的列表

    public QuizQuestionSelector(List<String> quizQuestions) {
        this.quizQuestions = quizQuestions;
    }

    public List<String> getRandomQuestions(int numberOfQuestions) {
        int numQuestions = quizQuestions.size();
        List<Integer> randomQuestionIndexes = IntStream.range(0, numQuestions)
                .boxed()
                .collect(Collectors.toList());
        Collections.shuffle(randomQuestionIndexes);

        List<String> selectedQuestions = new ArrayList<>();
        for (int i = 0; i < numberOfQuestions && i < randomQuestionIndexes.size(); i++) {
            selectedQuestions.add(quizQuestions.get(randomQuestionIndexes.get(i)));
        }

        return selectedQuestions;
    }

    public static void main(String[] args) {
        // 示例用法
        List<String> questions = new ArrayList<>();
        questions.add("问题1");
        questions.add("问题2");
        questions.add("问题3");
        questions.add("问题4");
        questions.add("问题5");

        QuizQuestionSelector selector = new QuizQuestionSelector(questions);
        List<String> randomQuestions = selector.getRandomQuestions(3);

        System.out.println("随机抽取的问题：");
        for (String question : randomQuestions) {
            System.out.println(question);
        }
    }
}