Question

我试图从一个存储如下的文件中读取测验;

在第一行显示标识符和问题标识符，然后是问题标题，然后是问题标题，请回答带答案的标题，最后选择答案。

我试图读取文件，然后使用HashMap存储它

16 TF
Question
Because an ArrayList is an indexed collection, you can access its elements using a subscript. 
Answer
False
True
Selected
1

258 MC
Question
Fill in the blank. A Node is generally defined inside another class, making it a(n) ____ class.
Answer 
Private 
Inner 
Public 
Internal 
Selected 
2

37 L5
Question
How would you rate your programming skills? 
Answer
Excellent
Very good
Good
Not as good as they should be
Poor
Selected
-1

我的代码：

  Quiz newquiz = new Quiz();
    List<String> newArray = new ArrayList<String>();
    Map<Integer, String> newquizmap = new HashMap<Integer, String>();
    BufferedReader BufferedReader = new BufferedReader(new FileReader('file.txt'));
    String line = null;

    while ((line = BR.readLine()) != null) {
        String nuquiz[] = line.split("   ");
        BufferedReader.readLine();

       newquiz.newquestionid = Integer.parseInt(parts[0]);



             lines.add(line);
               newquizmap.put(newquiz.newquestionid, newArray.toString());


            line = BufferedReader.readLine();

            System.out.println(newquizmap);
        } 

    } BR.close();

我知道这不对，我甚至认为它很接近，但是我真的在努力解决这个问题，任何人都可以给我任何帮助吗？

编辑：

          Quiz newquiz = new Quiz();
    List<String> newArray = new ArrayList<String>();
    Map<Integer, String> newquizmap = new HashMap<Integer, String>();
    BufferedReader BufferedReader = new BufferedReader(new FileReader('file.txt'));
    String line = null;

    while ((line = BR.readLine()) != null) {
        String nuquiz[] = line.split("   ");
        BufferedReader.readLine();

       newquiz.newquestionid = Integer.parseInt(parts[0]);



             lines.add(line);
               newquizmap.put(newquiz.newquestionid, newArray.toString());


            line = BufferedReader.readLine();

            System.out.println(newquizmap);
        } 

    } BR.close();

尝试过这段代码，它似乎用每个值填充每个地图键？

Answer 1

一种方法是使用java对象作为hashmap值。创建一个新类以包含以下属性（修改以处理所有问题用例）：

private String questionId; //This will hold question Id - TF    
private String question; //This will hold the Question - Because an ArrayList is an indexed collection, you can access its elements using a subscript. 
    private List<String> choices; //This will hold the choices - Private Inner Public Internal 
    private Integer selectedChoice; //This will hold the answer

在类中包含参数化构造函数和其他必需的方法。

解析文件，遍历内容，创建这个新类的对象，并添加到hashmap，其中“id”作为键，“pojo object”作为值。

注意：请修复java代码中的一些其他问题（格式，编码标准，如以大写，QuestionSet，StdOut等开头的变量名）

用于映射的Java Buffered Reader

1 个答案: