8 Package and Interface

import a.*;

interface Area
 {
   float compute(float x, float y);
 }

class Rectangle implements Area
 {
   public float compute(float x, float y)
    {
return(x * y);
    }
 }

class Triangle implements Area
 {
   public float compute(float x,float y)
    {
return(x * y/2);
    }
 }

class InterfaceArea
 {
   public static void main(String args[])
    {
Rectangle rect = new Rectangle();
Triangle tri = new Triangle();
Area area;
area = rect;
System.out.println("Area Of Rectangle = "+ area.compute(1,2));
area = tri;
System.out.println("Area Of Triangle = "+ area.compute(10,2));
    }
 }