ShippingContainer.java
package shapes;

import java.util.Scanner;

public class ShippingContainer {
    public static void main(String[] args) {
        double width = width();
        double length = length();
        double height = height();
        SRectangle face = new SRectangle(length,width);
        SRectangle key = new SRectangle(face.diagonal(),height);
        double distance = key.diagonal();
        System.out.println("distance between the corners = " + distance);
    }

    private static double height() {
        System.out.print("Please enter the height of the rectangular prism: ");
        Scanner scanner = new Scanner(System.in);
        double height = scanner.nextDouble();
        return height;
    }

    private static double length() {
        System.out.print("Please enter the length of the rectangular prism: ");
        Scanner scanner = new Scanner(System.in);
        double length = scanner.nextDouble();
        return length;
    }

    private static double width() {
        System.out.print("Please enter the width of the rectangular prism: ");
        Scanner scanner = new Scanner(System.in);
        double width = scanner.nextDouble();
        return width;
    }
}