public enum TrafficLight {
  RED("红"), YELLOW("黄"), GREEN("绿");
  private String name;
  private TrafficLight(String name) {
    this.name = name;
  }
  public String getName() {
    return name;
  }
  public void jude(TrafficLight light) {
    switch (light) {
    case RED:
      System.out.println("stop");
      break;
    case YELLOW:
      System.out.println("go");
      break;
    case GREEN:
      System.out.println("wait");
      break;
    default:
      break;
    }
  }
  public static void main(String[] args) {
    for (TrafficLight e : TrafficLight.values()) {
      System.out.println(e.name());
    }
  }
}