如何实现推广

[java]代码库

package com.test1;

public class EnumTest {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		WeekDay1 weekDay = WeekDay1.MON;
		System.out.println(weekDay.nextDay());
		
		WeekDay weekDay2 = WeekDay.FRI;
		System.out.println(weekDay2);
		System.out.println(weekDay2.name());
		System.out.println(weekDay2.ordinal());
		System.out.println(weekDay2.hashCode());
		System.out.println(weekDay2.values().length);
	}
	public enum WeekDay{
		SUN,MON,TUE,WED,THI,FRI,SAT;
		private WeekDay(){
			System.out.println("first");
		}
		private WeekDay(int day){
			System.out.println("second");
		}
	}
	public enum TrafficLamp{
		RED(30){

			@Override
			public TrafficLamp nextLamp() {
				// TODO Auto-generated method stub
				return GREEN;
			}
			
		},
		GREEN(45){

			@Override
			public TrafficLamp nextLamp() {
				// TODO Auto-generated method stub
				return YELLOW;
			}
			
		},
		YELLOW(5){

			@Override
			public TrafficLamp nextLamp() {
				// TODO Auto-generated method stub
				return RED;
			}
			
		};
		public abstract TrafficLamp nextLamp();
		private int time;
		private TrafficLamp(int time){
			this.time=time;
		}
	}
}