Generics - Inheritance and constructors

 

// Generic programming

// Inheritance and constructors

 

class GenA<T1 extends Number>

{

     public T1 l, b;

     double area;

    

     GenA(T1 x, T1 y)

     {

          l = x;

          b = y;

     }

    

     public void fnArea()

     {

          area = l.doubleValue()*b.doubleValue();

          System.out.println("Area = "+area);

     }

}

 

 

class GenV<T1 extends Number> extends GenA<T1>

{

     T1 h;

     double vol;

    

     GenV(T1 x, T1 y, T1 z)

     {

          super(x,y);

          h = z;

     }

    

     public <T1 extends Number> void fnVol()

     {

          vol = l.doubleValue()*b.doubleValue()*h.doubleValue();

          System.out.println("Volume = "+vol);

     }

}

 

public class Generics_Demo

{

     public static void main(String as[])

     {  

          GenV<Double> g1 = new GenV<Double>(4.2,5.6,6.1);

          g1.fnArea();

          g1.fnVol();

     }

}