|
|
package com.personalproject.model;
|
|
|
|
|
|
import java.util.List;
|
|
|
|
|
|
/**
|
|
|
* 表示一个带有多项选择的测验题目.
|
|
|
*/
|
|
|
public final class QuizQuestion {
|
|
|
|
|
|
private final String questionText;
|
|
|
private final List<String> options;
|
|
|
private final int correctAnswerIndex;
|
|
|
|
|
|
/**
|
|
|
* 创建新的测验题目.
|
|
|
*
|
|
|
* @param questionText 题目文本
|
|
|
* @param options 答案选项列表
|
|
|
* @param correctAnswerIndex 正确答案在选项列表中的索引
|
|
|
*/
|
|
|
public QuizQuestion(String questionText, List<String> options, int correctAnswerIndex) {
|
|
|
if (questionText == null || questionText.trim().isEmpty()) {
|
|
|
throw new IllegalArgumentException("Question text cannot be null or empty");
|
|
|
}
|
|
|
if (options == null || options.size() < 2) {
|
|
|
throw new IllegalArgumentException("Options must contain at least 2 choices");
|
|
|
}
|
|
|
if (correctAnswerIndex < 0 || correctAnswerIndex >= options.size()) {
|
|
|
throw new IllegalArgumentException("Correct answer index out of bounds");
|
|
|
}
|
|
|
|
|
|
this.questionText = questionText;
|
|
|
this.options = List.copyOf(options); // 不可变副本
|
|
|
this.correctAnswerIndex = correctAnswerIndex;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 获取题目文本.
|
|
|
*
|
|
|
* @return 题目文本
|
|
|
*/
|
|
|
public String getQuestionText() {
|
|
|
return questionText;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 获取答案选项列表.
|
|
|
*
|
|
|
* @return 不可修改的答案选项列表
|
|
|
*/
|
|
|
public List<String> getOptions() {
|
|
|
return options;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 获取正确答案在选项列表中的索引.
|
|
|
*
|
|
|
* @return 正确答案的索引
|
|
|
*/
|
|
|
public int getCorrectAnswerIndex() {
|
|
|
return correctAnswerIndex;
|
|
|
}
|
|
|
|
|
|
/**
|
|
|
* 检查给定的答案索引是否正确.
|
|
|
*
|
|
|
* @param answerIndex 用户答案的索引
|
|
|
* @return 若答案正确则返回 true，否则返回 false
|
|
|
*/
|
|
|
public boolean isAnswerCorrect(int answerIndex) {
|
|
|
return answerIndex == correctAnswerIndex;
|
|
|
}
|
|
|
}
|
