java - 如何将文件中的输入放入树形图中

Question

我试图将读取文件的扫描仪对象中的数据放入树形图中。有什么建议吗？

这里是代码:

   public class StudentViewController {
   try {
        Scanner ReadFile= new Scanner(new File(currentFileName));
        Student.ReadStudent(ReadFile);
        studentMap.put



       } catch (Exception e) {
        System.out.println("Corrupt File");
        System.out.print(e);
       }
      }

这是我读取数据的方法:

   public static Student ReadStudent (Scanner sc){

    Student student = new Student(sc.next(),sc.next());
    student.ConcreateID = sc.nextInt();
    NextID = sc.nextInt();
    int gradeNum = sc.nextInt();
    //Loop that runs through the file the number of grades specified for that student,
    //retrieving each grade and adding it into the array for that specific student Object.
    for (int i = 0; i < gradeNum; i++) {
        student.addGrade(sc.nextDouble());
    }
    return student;
}

}

这是 StudentMap 的贴花位置:

public class StudentViewController {
//student version number

private double versionNum = 1.0;
//A boolean to check if the Student file has been altered
private static boolean dirtyByte = false;
//a scanner to take in input data for operations
private Scanner Scan = new Scanner(System.in);
//A tree map to store the students
private TreeMap<String, Student> studentMap = new TreeMap<String, Student>();
//a String to take in input option
String input;
//Name of the current file being written or read
private static String currentFileName = "";

Answer 1

您可以像这样将从 ReadStudent() 方法返回的新创建的 Student 添加到您的 map 中。

studentMap.put("aUniqueStringToIdentifyTheStudent", Student.ReadStudent(ReadFile));

这里需要注意的一点是，您的 try-catch 应该位于 StudentViewController 类中的方法内，而不是像 StudentViewController.