创建对象时的IndexOutOfBoundsException（Java）

Question

我正在做一个问答游戏，它将从一个文本文件中阅读一些问题和它们各自的答案。这些问题首先被放入一个ArrayList，然后每个问题都要被转换成一个单独的问题对象。正是在程序的这一部分中，我接收到一个IndexOutOfBoundsException。

文本文件的格式如下：

问题
正确答案
错误答案1
错误答案2
错误答案3
（空行）
问题2
...
...
...

文本文件在名为IO的类中使用BufferedReader处理。问题存储在ArrayList>中，因此每个问题都是单独存储的。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：public class SingleQuestion{private String Question；private String CorretAnswer；private String Answer2；private String Answer3；private String

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构造函数的末尾时，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);