construct clone of an object and call constructor in the super class : Clone « Class Definition « Java Tutorial

1. Java Tutorial
2. Class Definition
3. Clone

class Box {
  private double width;

  private double height;

  private double depth;

  Box(Box ob) { 
    width = ob.width;
    height = ob.height;
    depth = ob.depth;
  }

  Box(double w, double h, double d) {
    width = w;
    height = h;
    depth = d;
  }

  Box() {
    width = -1; 
    height = -1;
    depth = -1; 
  }

  Box(double len) {
    width = height = depth = len;
  }

  double volume() {
    return width * height * depth;
  }
}

class BoxWeight extends Box {
  double weight;

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

  BoxWeight(double w, double h, double d, double m) {
    super(w, h, d); 
    weight = m;
  }

  BoxWeight() {
    super();
    weight = -1;
  }

  BoxWeight(double len, double m) {
    super(len);
    weight = m;
  }
}

class DemoSuper {
  public static void main(String args[]) {
    BoxWeight mybox1 = new BoxWeight(10, 20, 15, 34.3);
    BoxWeight mybox2 = new BoxWeight(2, 3, 4, 0.076);
    BoxWeight mybox3 = new BoxWeight();
    BoxWeight mycube = new BoxWeight(3, 2);
    BoxWeight myclone = new BoxWeight(mybox1);
    double vol;

    vol = mybox1.volume();
    System.out.println("Volume of mybox1 is " + vol);
    System.out.println("Weight of mybox1 is " + mybox1.weight);
    System.out.println();

    vol = mybox2.volume();
    System.out.println("Volume of mybox2 is " + vol);
    System.out.println("Weight of mybox2 is " + mybox2.weight);
    System.out.println();

    vol = mybox3.volume();
    System.out.println("Volume of mybox3 is " + vol);
    System.out.println("Weight of mybox3 is " + mybox3.weight);
    System.out.println();

    vol = myclone.volume();
    System.out.println("Volume of myclone is " + vol);
    System.out.println("Weight of myclone is " + myclone.weight);
    System.out.println();

    vol = mycube.volume();
    System.out.println("Volume of mycube is " + vol);
    System.out.println("Weight of mycube is " + mycube.weight);
    System.out.println();
  }
}