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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7.  
  8. class Product
  9. {
  10. 	public void buy(Market m)
  11.     {
  12.         System.out.println("Search a product in market");
  13.     }
  14.  
  15.     public void buy(Shop s)
  16.     {
  17.         System.out.println("Search a product in shop");
  18.     }
  19.  
  20. }
  21.  
  22. class Mobile extends Product
  23. {
  24. 	public void buy(Market m)
  25.     {
  26.         System.out.println("Search a mobile in market");
  27.     }
  28.  
  29.     public void buy(Shop s)
  30.     {
  31.         System.out.println("Search a mobile in shop");
  32.     }
  33.  
  34. }
  35.  
  36. class Market
  37. {
  38.     public void buy(Product product)
  39.     {
  40.         product.buy (this);
  41.     }
  42. }
  43.  
  44. class Shop extends Market
  45. {
  46.     public void buy(Product product)
  47.     {
  48.         product.buy (this);
  49.     }
  50. }
  51.  
  52. /* Name of the class has to be "Main" only if the class is public. */
  53. class Ideone
  54. {
  55. 	public static void main (String[] args) throws java.lang.Exception
  56. 	{
  57. 		System.out.println("Initial example");
  58. 		Market market = new Market();
  59. 		Market shop = new Shop();
  60.  
  61. 		market.buy(new Product());
  62. 		shop.buy(new Mobile());
  63.             	Product p1 = new Product(); 
  64. 		Product p2 = new Mobile();    
  65.  
  66.    		System.out.println("New example");
  67. 		shop.buy(p1);
  68. 		shop.buy(p2);
  69. 		p1 = p2;
  70. 		shop.buy(p1);
  71.  
  72. 	}
  73. }
Success #stdin #stdout 0.08s 2841600KB
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Standard input is empty
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Initial example
Search a product in market
Search a mobile in shop
New example
Search a product in shop
Search a mobile in shop
Search a mobile in shop
https://ideone.com/wzIjWB
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
public

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