java - 创建对象时出现 IndexOutOfBoundsException (Java)

Question

我正在制作一个问答游戏，它将从文本文件中读取许多问题及其各自的答案。这些首先被放入一个 ArrayList 中，然后每个问题将被转换为一个单独的问题对象。正是在程序的这一部分中，我收到了 IndexOutOfBoundsException。

文本文件的格式如下:

Question
Correct Answer
Wrong Answer1
Wrong Answer2
Wrong Answer3
(emptyline)
Question2
...
...
...

文本文件在名为 IO 的类中使用 bufferedReader 进行处理。问题存储在 ArrayList> 中，以便每个问题单独存储。在一个名为 questions 的类中，我有一个用于从 ArrayList 创建对象的方法。

代码如下所示:

public class Questions
{

private ArrayList<ArrayList<String>> originalList;
private ArrayList<SingleQuestion> newList;
private ArrayList<SingleQuestion> objectList;
private IO io;



public Questions(){
    io = new IO();  //Creates a new instance of IO.
    objectList = new ArrayList<SingleQuestion>();
    createQuestions();
}

public void createQuestions(){

    originalList = io.getArray();

    for(int i = 0; i < originalList.size(); i++)
    {
        objectList.add(new SingleQuestion(originalList.get(i)));
    }

}

SingleQuestion 类构造函数如下所示: 公共(public)类单问题{ 私有(private)字符串问题； 私有(private)字符串正确答案； 私有(private)字符串答案2； 私有(private)字符串答案3； 私有(private)字符串答案4；

public SingleQuestion(ArrayList<String> questionArray){

    this.question = questionArray.get(0);
    this.correctAnswer = questionArray.get(1);
    this.answer2 = questionArray.get(3);
    this.answer3 = questionArray.get(4);
    this.answer4 = questionArray.get(5);
}

当代码到达 SingleQuestions 构造函数的最后时，我得到一个 IndexOutOfBoundsException。

错误消息如下所示:

Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 5, Size: 5
 at java.util.ArrayList.rangeCheck(Unknown Source)
 at java.util.ArrayList.get(Unknown Source)
 at MVC_test.SingleQuestion.<init>(SingleQuestion.java:21)
 at MVC_test.Questions.createQuestions(Questions.java:47)
 at MVC_test.Questions.<init>(Questions.java:20)
 at MVC_test.GModel.<init>(GModel.java:23)
 at MVC_test.GMain.main(GMain.java:7)

Answer 1

this.question = questionArray.get(0);
this.correctAnswer = questionArray.get(1);
this.answer2 = questionArray.get(3);
this.answer3 = questionArray.get(4);
this.answer4 = questionArray.get(5);

应该是

this.question = questionArray.get(0);
this.correctAnswer = questionArray.get(1);
this.answer2 = questionArray.get(2);
this.answer3 = questionArray.get(3);
this.answer4 = questionArray.get(4);