BoxWeight.java

// import java.util.ArrayList;

// import java.lang.reflect.Parameter;

public class BoxWeight extends Box{
    double weight;
    // double s;
    // double b;

    public BoxWeight() {
    //     super(s);
    //     this.l = s;
    //     this.b = s;
    //     this.w = weight; 
        this.weight = -1;
    }

//    @Override
    // static void greeting() {
    //     System.out.println("Hey, I am in BoxWeight class. Greetings!");
    //     ArrayList list = new ArrayList();
    // }

    BoxWeight (BoxWeight old) {
        super(old);
        weight = old.weight;
    }

    BoxWeight(double side) {
        super(side); // Calling the other constructor of the Box class with only one side
        System.out.println("Hello i am Overriding");
        // this.weight = weight;
    }
    // Parameterized Parameter
    public BoxWeight(double l, double h, double w, double weight) {
        // used to initialise values present in parent class
        super(l, h, w); // what is this? call the parent class constructor
//        System.out.println(super.weight);
        this.weight = weight;
    }

}