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  1. class Hair
  2. {
  3.     public static void main(String[] args)
  4.     {
  5.         Hair hair = new Hair();
  6.         hair.invokeMethod(100);
  7.         hair.invokeMethod(200);
  8.         hair.setMethod(Hair::datsumou);
  9.         hair.invokeMethod(500);
  10.         hair.invokeMethod(800);
  11.         hair.setMethod(Hair::shokumou);
  12.         hair.invokeMethod(1);
  13.     }
  14.  
  15.     private int count = 1000;
  16.     private Method method = Hair::shokumou;
  17.  
  18.     public void invokeMethod(int num)
  19.     {
  20.         method.invoke(this, num);
  21.     }
  22.  
  23.     public void setMethod(Method method)
  24.     {
  25.         this.method = method;
  26.     }
  27.  
  28.     private static void shokumou(Hair hair, int num)
  29.     {
  30.         if (num <= 0) throw new IllegalArgumentException();
  31.         hair.count += num;
  32.         System.out.printf("%d本植毛しました、現在の髪の毛%d本%n", num, hair.count);
  33.     }
  34.  
  35.     private static void datsumou(Hair hair, int num)
  36.     {
  37.         if (num <= 0 || num > hair.count) throw new IllegalArgumentException();
  38.         hair.count -= num;
  39.         System.out.printf("%d本脱毛しました、現在の髪の毛%d本%n", num, hair.count);
  40.         if (hair.count == 0)
  41.         {
  42.             System.out.println("つるっぱげです。");
  43.         }
  44.     }
  45. }
  46.  
  47. interface Method
  48. {
  49.     void invoke(Hair hair, int num);
  50. }
  51.  
Success #stdin #stdout 0.14s 4386816KB
comments (?)
stdin 
Standard input is empty
stdout 
100本植毛しました、現在の髪の毛1100本
200本植毛しました、現在の髪の毛1300本
500本脱毛しました、現在の髪の毛800本
800本脱毛しました、現在の髪の毛0本
つるっぱげです。
1本植毛しました、現在の髪の毛1本
https://ideone.com/AghCys
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
secret

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