Question

我对OOP很新。我终于慢慢地把握了它的概念。但我仍然坚持如何抓住下一个新的＆＃34;盒子＃34;来自我的测验课的类型问题。我甚至不知道如何解释它，可能缺少适当的术语。但这是我的代码。

我有两个课程：问题和测验

public class Question{

   String question;
   public Question(String placeQuestion){
   question = placeQuestion;
   }
}

public class Quiz{
private ArrayList<Question> questions = new ArrayList<Question>();

   public void setQuestion(String q){
   Question setQ = new Question(q);
   questions.add(setQ);
   //each time here I create a "box" of Question class that has a String question in it 
   }
   public Question getNextQuestion(){
   //here I want to get the next "box" Question class with the String question 
   //in it. How do I track the current question "box" and go to the next one?        
   }
}

那么我该如何进入下一个问题类＆＃34;框＆＃34;在测验班？例如，我有20个问题。我想让getNextQuestion返回问题＆＃34;框＆＃34;问题2，如果我在1。或者实际上我怎么知道我在问题1＆＃34;框＆＃34;

Answer 1

这样的事情：

public class Question {
    String question;
    public Question(String placeQuestion) {
        question = q;
    }
}

public class Quiz {
    private ArrayList<Question> questions = new ArrayList<Question>();
    private int qindex=0;

    public void setQuestion(String q){
        Question setQ = new Question(q);
        questions.add(setQ);
        //each time here I create a "box" of Question class that has a String question in it 
    }
    public Question getNextQuestion(){
        Question q = questions.get(qindex);
        qindex++;
        return q;
    }
}

请注意，您需要做更多的工作 - 比如在调用问题[qindex]之前检查ArrayList的长度。

Java：如何抓住下一个新的＆＃34;框＆＃34;？

1 个答案: