Box.java

public class Box {
    double l;
    double h;
    double w;
    double b;
    // double f;
    // double a;
    // double b;
//    double weight;

    // static void greeting() {
    //     System.out.println("Hey, I am in Box class. Greetings!");
    // }

    // public double getL() {
    //     return l;
    // }
    Box (double s) {
        // super(); Object class
        System.out.println("Single Parameterized Constructor");
        this.w = s;
        this.l = s;
        this.h = s;
    }
    // Default Constructor -> same name as of the class name
    // No Parameterized Constructor
    Box () {
        System.out.println("Default Constructor");
        this.h = -1;
        this.l = -1;
        this.w = -1;
    }

    // cube
    // Parametrized Constructor
    Box(double l, double h, double w) {
        System.out.println("Box class constructor");
        this.l = l;
        this.h = h;
        this.w = w;
    }
    // Copying Constructor
    Box(Box other) {
        this.h = other.h;
        this.l = other.l;
        this.w = other.w;
    }
}