ShopKeeper.java

public class ShopKeeper { 

      private MobileShop iphone; 
      private MobileShop samsung; 
      private MobileShop blackberry; 

      public ShopKeeper(){ 
            iphone= new Iphone(); 
            samsung=new Samsung(); 
            blackberry=new Blackberry(); 

      } 

      public void iphoneSale(){ 
            iphone.modelNo(); 
            iphone.price(); 
      } 

      public void samsungSale(){ 
            samsung.modelNo(); 
            samsung.price(); 
      } 

      public void blackberrySale(){ 
            blackberry.modelNo(); 
            blackberry.price(); 
      } 

}