Java enumeration-traffic lights

 

Package advancejava. enumtest; Enum trafficlamp {red (30) {public trafficlamp nextlamp () {return green ;}, Green (20) {public trafficlamp nextlamp () {return red ;}}; public int time; private trafficlamp () {} private trafficlamp (INT time) {This. time = time;} public abstract trafficlamp nextlamp () ;}/ ** can declare abstract methods in a class, this class is an abstract class *, but when this type of object in this class is implemented through the Anonymous class Method *, then this class is not an abstract class, you can instantiate **/public class trafficlamptest {public static void main (string ARGs []) {}}