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  1. import java.util.Map;
  2.  
  3. enum Symbol {
  4.     ROCK,
  5.     PAPER,
  6.     SCISSORS;
  7.  
  8.     private static final Map<Symbol, Symbol> ASSOCIATIONS = Map.of(
  9.         ROCK, SCISSORS,
  10.         SCISSORS, PAPER,
  11.         PAPER, ROCK
  12.     );
  13.  
  14.     public static void main(String[] args) {
  15.         System.out.println("Rock against scissors: " + ROCK.against(SCISSORS));
  16.         System.out.println("Rock against paper: " + ROCK.against(PAPER));
  17.         System.out.println("Rock against rock: " + ROCK.against(ROCK));
  18.     }
  19.  
  20.     public Result against(Symbol other) {
  21.         if (ASSOCIATIONS.get(this) == other) {
  22.             return Result.WIN;
  23.         }
  24.         else if (ASSOCIATIONS.get(other) == this) {
  25.             return Result.LOSE;
  26.         }
  27.         else {
  28.             return Result.TIE;
  29.         }
  30.     }
  31. }
  32.  
  33. enum Result {
  34.     WIN, LOSE, TIE;
  35. }
  36.  
Success #stdin #stdout 0.12s 50072KB
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Rock against scissors: WIN
Rock against paper: LOSE
Rock against rock: TIE
https://ideone.com/ucVU9t
language:
Java (HotSpot 12)
created:
4 years ago
visibility:
public

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