public class PassingObjects {

    double height;
    double width;
    double length;

    public PassingObjects(double height, double length, double width) {
        this.height = height;
        this.width = width;
        this.length = length;
    }

    public PassingObjects(PassingObjects obj) {
        height = obj.height;
        length = obj.length;
        width = obj.width;

     }

    public void calculateVolume() {
        System.out.println(this.length * this.width * this.height);
  }

    public static void main(String[] args) {
         PassingObjects obj = new PassingObjects(30, 40, 10);
         PassingObjects obj2 = new PassingObjects(obj);

         obj.calculateVolume();
         obj2.calculateVolume();


  }

}