I have to write two methods for a program that calculates the area and the perimeter of a rectangle when the user prompts the width and the height?

`import java.util.Scanner;

public class InteractiveRectangle
{
    public static void main(String[] args)
    {

         int height = readPositiveInteger("Enter the height");

         int width = readPositiveInteger("Enter the width");

         printRectangleDetails(height, width);
    }

    /**
     * Read in an integer and return its value
     * @param the prompt to be shown to the user
     */
     public static int readInteger(String prompt)
    {

        Scanner scan = new Scanner(System.in);

        System.out.println(prompt);

        while (!scan.hasNextInt()) // while non-integers are present...
        {
            scan.next(); //...read and discard input, then prompt again

            System.out.println ("Bad input. Enter an integer");
         }

        int firstInteger = scan.nextInt();

        return firstInteger;

    }

    /**
     * Read in an integer greater than 0 and return its value
     * @ param the prompt to be shown to the user
     */
     public static int readPositiveInteger(String prompt)
    {
        int input = 0;

        Scanner scan = new Scanner(System.in);

        boolean first = false;

        while (!scan.hasNextInt())
        {
            int quantity = scan.nextInt();

            if (quantity > 0)
        {
            first = true;

            quantity = scan.nextInt();

        } 
            else if (quantity <= 0)
        {
            System.out.println("Bad input. Enter a positive integer.");
        }

        }
         return input;
   }

     /**
     * Returns the area of a rectangle
     * @param height the height of the rectangle
     * @param width the width of the rectangle
     */

      public static int area (int height, int width)
     {
        return height * width;
      }

     /**
      * Returns the perimeter of a retangle
      * @param height the height of the rectangle
      * @param width the width of the rectangle
      */
      public static int perimeter (int height, int width)
      {
         return (height * 2) + (width * 2);
      }

    /**
     * Prints the area, the perimeter, the length and the width 
     * @param heigth the height of the rectangle
     * @param width the width of the rectangle
     */
     public static void printRectangleDetails (int height, int width)
    {
        System.out.println("The height is " + height);

        System.out.println("The width is " + width);

        System.out.println("The area is " + area(height, width));

        System.out.println("The perimeter is " + perimeter(height, width));
    }
}

This is my program so far, but I have some problems with the readPositiveInteger method and I also have to write a method that asks the user if he wants another rectangle typing "y" if he wants it and "n" if he doesn't using a while loop. Thank you for