int cannot be dereferenced error message

[JPane]

package bankobject;
import java.io.*;
import javax.swing.JOptionPane;
 
class Number {
   String studentName;
   String teacherName;
   int[] Number;
 
public Number () {
   studentName = JOptionPane.showInputDialog("Please Enter student name");
    teacherName = JOptionPane.showInputDialog("Please Enter the teacher name ");
    int numNumber = Integer.parseInt(JOptionPane.showInputDialog("Please enter the number of numbers"));
    Number[] obj = new Number [numNumber];
    for (i = 0; i < numNumber.length; i++)
       obj [i] = new Number ();   
}
 

I want the array to take as many numbers object, by using a for loop and instantiate each number object by calling the Number constructor.

[BigDaddyLH]

I think you meant to write this:

for (int i = 0; i < numNumber; i++)

[BigDaddyLH]

There are also several logical errors in your code that you need to attend to. In your Number class you create an array full of Number objects -- that could lead to an infinite loop if you keep creating non-empty arrays. I think you meant the user interaction code to be elsewhere, perhaps in the main method, which hasn't shown up, yet. Also you have an int array called Number -- surely pure confusion on your part?

[JPane]

There are also several logical errors in your code that you need to attend to. In your Number class you create an array full of Number objects -- that could lead to an infinite loop if you keep creating non-empty arrays. I think you meant the user interaction code to be elsewhere, perhaps in the main method, which hasn't shown up, yet. Also you have an int array called Number -- surely pure confusion on your part?

Yeah, I meant for (int i = 0; i < numNumber; i++); forget the int there.

in the attributes list I wanted to make an array of number objects then in the constructor I would prompt the user for the number of number objects and use a for loop to instantiate each number account using the number constructor for each.

in the main method I would just instantiate two number objects.

The problem I'm having is in the for loop and getting the error " int cannot be dereferenced error message" I know I have to do something with it because it's a primitive, just don't know how in an array and for loop.

[Ganon11]

Don't know if this will fix your problem, but it looks like you declare a private data member of the Number class called int[] Number - that;s bound to give you problems. Consider a better name for it.

[JPane]

Don't know if this will fix your problem, but it looks like you declare a private data member of the Number class called int[] Number - that;s bound to give you problems. Consider a better name for it.

maybe int [] grade is better.


Still doesn't work since the error is coming with this line

for (int i = 0; i < numNumber; i++)

[BigDaddyLH]

I don't get syntax errors from your code when I change it as I indicated.

[JPane]

Thanks for the help.

[JPane]

There are also several logical errors in your code that you need to attend to. In your Number class you create an array full of Number objects -- that could lead to an infinite loop if you keep creating non-empty arrays. I think you meant the user interaction code to be elsewhere, perhaps in the main method, which hasn't shown up, yet. Also you have an int array called Number -- surely pure confusion on your part?

If I have two classes which are number and student how would I call them up in the main method when I just instantiate a number object. Meaning the input attributes in the student class.

Both classes are composition of each other.

[BigDaddyLH]

If I have two classes which are number and student how would I call them up in the main method when I just instantiate a number object. Meaning the input attributes in the student class.

Both classes are composition of each other.

I don't understand what you are trying to say. perhaps is you posted some code to explain what you are trying to do.

[JPane]

 
      package studentobject;
 
      import java.io.*;
 
      import javax.swing.JOptionPane;
 
 
      class Number {
 
         String studentName;
 
 
         int[] Number;
 
 
      public Number () {
 
         studentName = JOptionPane.showInputDialog("Please Enter student name");
 
          teacherName = JOptionPane.showInputDialog("Please Enter the teacher name ");
 
          int numNumber = Integer.parseInt(JOptionPane.showInputDialog("Please enter the number of numbers"));
 
          Number[] obj = new Number [numNumber];
 
          for (i = 0; i < numNumber.length; i++)
 
             obj [i] = new Number ();   
 
      }
 
 
class Student
 
{
 
    String schoolName;
 
 
// Methods
 
 
    void  students()
 
    { 
 
 
        double students = 0;
 
 
    }
 
 
 
    // Constructor
     public Student ()
 
 {
 
 
   schoolName = JOptionPane.showInputDialog("Please Enter the school name ");
 
 
 }
 
  }
 
 
}
public class StudentOject  {
 
 
    public static void main(String[] args) {
 
      Number nu = new Number ();
 
 
   String output = "Student Name " + nu.studentName + "      Teacher Name: "  + nu.teacherName
 
 
 
 
 
 
 
 
 
        JOptionPane.showMessageDialog(null, output, "Student Information",
                JOptionPane.INFORMATION_MESSAGE);
 
 
    }
 
 
}   
 
 
 
 
 

Since the student class is part of the number class when I do the output it isn't going to work with the student class because I only made a new object in the number class.

[BigDaddyLH]

public Number () {
    ...
    int numNumber = Integer.parseInt(JOptionPane.showInputDialog("Please enter the number of numbers"));
    Number[] obj = new Number [numNumber];
    for (i = 0; i < numNumber.length; i++)
        obj [i] = new Number ();   
}
 

I can't get past this constructor. Do you understand it? When you construct a Number object, you prompt the user for a size, allocate an array and then construct more Number objects, each of which will prompt the user for a size, allocate an array and then construct more Number objects, each of which will prompt the user for a size, allocate an array ...

I think you need to start over again. I still have no idea what you are trying to do, and I'm not convinced anyone does, including yourself. First, answer these questions.

1. What is a Number object? What are its key responsibilities?
2. What is a Student object? What are its key responsibilities?
3. What is a StudentObject object? What are its key responsibilities?