package com.bobo.www.cxf.impl;  

public enum Traffic {  

    Red(1), Green(2), Yellow(3);//必须最前面  

    private int flag = 0;  

    private Traffic() {

        System.out.println("init");

    }  

    private Traffic(int flag) {

        this.flag = flag;

    }  

    public String toString() {

        return String.valueOf(flag);

    };  

} 

public class doit {

    public static void main(String[] args) {

        Traffic t1 = Traffic.Green;

        for(Traffic t : Traffic.values()){

            System.out.println(t);

        }

        System.out.println();

    }

}