Class Rock

enums/Rock.java:8–21

import static enums.Outcome.*;

public class Rock implements Item {
  @Override public Outcome compete(Item it) {
    return it.eval(this);
  }
  @Override
  public Outcome eval(Paper p) { return WIN; }
  @Override
  public Outcome eval(Scissors s) { return LOSE; }
  @Override
  public Outcome eval(Rock r) { return DRAW; }
  @Override public String toString() {
    return "Rock";
  }
}