枚举原理Enum

来源：互联网发布：淘宝特种经营有什么用编辑：程序博客网时间：2024/06/06 18:35

原来方式实现类似枚举新方法enum对照

public abstract class WeekDay{                                           public class EnumAbstract{
    private WeekDay(){}                                                                  public static void main(String[] args){
                                                                                                               TrafficLamp tl = TrafficLamp.RED;
public abstract WeekDay nextDay();                                                        System.out.println(tl);

public final static WeekDay SUN = new WeekDay(){ }

           public WeekDay nextDay(){                                               public enum TrafficLamp{
              return MON;                                                                            RED(30){
           }                                                                                                      public TrafficLamp nextLamp(){
    };                                                                                                                  return GREEN;

    public final static WeekDay MON = new WeekDay(){                   }

           public WeekDay nextDay(){                                                      },GREEN(45){
              return SUN;                                                                                   public TrafficLamp nextLamp(){
           }                                                                                                               return YELLOW;
    };                                                                                                                 }
                                                                                                                  },YELLOW(5){
    public String toString(){                                                                          public TrafficLamp nextLamp(){
       return this==SUN?"SUN":"MON";                                                          return RED;
    }                                                                                                                   }
}                                                                                                                  };
                                                                                                             public abstract TrafficLamp nextLamp();

private int time;
private TrafficLamp(int time){

this.time = time;

}
}

}