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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. interface Price{
  8.     int getValue();
  9.     void setValue(int value);
  10. }
  11.  
  12. class PrimePrice implements Price{
  13.     private int value;
  14.     PrimePrice(int value){
  15.         this.value = value;
  16.     }
  17.     public int getValue(){
  18.         return this.value;
  19.     }
  20.     public void setValue(int value){
  21.         this.value = value;
  22.     }
  23. }
  24.  
  25. abstract class MarginPrice implements Price{
  26.     protected Price originalPrice;
  27.     MarginPrice(Price price){
  28.         this.originalPrice = price;
  29.     }
  30.     public void setValue(int value){
  31.         this.originalPrice.setValue(value);
  32.     }
  33. }
  34.  
  35. class WholesalePrice extends MarginPrice{
  36.     private int advantage;
  37.     WholesalePrice(Price price, int advantage){
  38.         super(price);
  39.         this.advantage = advantage;
  40.     }
  41.     public int getValue(){
  42.         return this.originalPrice.getValue() + advantage;
  43.     }
  44. }
  45.  
  46. class DoublePrice extends MarginPrice{
  47.     DoublePrice(Price price){
  48.         super(price);
  49.     }
  50.     public int getValue(){
  51.         return this.originalPrice.getValue() * 2;
  52.     }
  53. }
  54.  
  55. class Ideone{
  56. 	public static void main (String[] args) throws java.lang.Exception{
  57.         Price price = new WholesalePrice(
  58.                 new DoublePrice(
  59.                     new WholesalePrice(
  60.                         new DoublePrice(
  61.                             new PrimePrice(120)
  62.                             )
  63.                         ,80
  64.                         )
  65.                     )
  66.                 ,200
  67.                 );
  68.         System.out.println(price.getValue());
  69.         price.setValue(100);
  70.         System.out.println(price.getValue());
  71.     }
  72. }
Success #stdin #stdout 0.1s 320576KB
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https://ideone.com/Z24LFA
language:
Java (12.0.1)
created:
7 years ago
visibility:
public

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