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知识点带有抽象方法的枚举

本帖最后由 yedong07a 于 2013-5-11 11:45 编辑

public class EnumTest {
public static void main(String[] args) {
      System.out.println(TrafficLamp.valueOf("YELLOW").nextLamp());
}
public enum TrafficLamp{
      RED(30){
         public abstract TrafficLamp nextLamp(){
         return GREEN;
      }
},
      GREEN(45){
         public abstract TrafficLamp nextLamp(){
         return YELLOW;
      }
},
      YELLOW(5){
         public abstract TrafficLamp nextLamp(){
         return RED;
      }
};
public abstract TrafficLamp nextLamp();
private int time;
private TrafficLamp(int time){
      this.time=time;
}
}
}
枚举，抽象类，构造方法。