我在使用这个构造函数时遇到了问题

Question

****代码如下所示****

package com.shreyansh;

import java.util.Scanner;

public class Student {
      private int rno;
      private String name;

      public Student() {
          this(0, "Not defined"); //what is the error in this line
      }

      public void enter() {
          System.out.println("Enter name of the student - ");
          Scanner scanner = new Scanner(System.in);
          this.name=scanner.nextLine();
          System.out.println("Enter the roll number - ");
          this.rno=scanner.nextInt();
          scanner.close();
      }
      public void show() {
          System.out.println("The name of the student is - "+name);
          System.out.println("And the roll number is - "+rno);
      }
}

Answer 1

从另一个构造函数调用构造函数时，必须定义要调用的构造函数：

正在添加此构造函数：

public Student(int rno, String name) {
    this.rno = rno;
    this.name = name;
}

将允许

this(0, "Not defined");