public class EnumTest {
    enum TrafficSignal
    {
        // This will call enum constructor with one
        // String argument
        RED("STOP"){
            @Override
            public String policeActionWhenNotFollowingRules() {
                return "fine $50";
            }
        }, GREEN("GO") {
        @Override
        public String policeActionWhenNotFollowingRules() {
            return "N/A";
        }
    }, ORANGE("SLOW DOWN") {
        @Override
        public String policeActionWhenNotFollowingRules() {
            return "Warning";
        }
    };

        // declaring private variable for getting values
        private String action;

        // getter method
        public String getAction()
        {
            return this.action;
        }

        // enum constructor - cannot be public or protected
        private TrafficSignal(String action)
        {
            this.action = action;
        }
        public abstract String policeActionWhenNotFollowingRules();
        public static TrafficSignal getEnum(String value) {
            for(TrafficSignal v : values())
                if(v.getAction().equalsIgnoreCase(value)) return v;
            throw new IllegalArgumentException();
        }
    }
    public static void main(String[] args) {
// let's print name of each enum and there action
        // - Enum values() examples
        TrafficSignal[] signals = TrafficSignal.values();

        for (TrafficSignal signal : signals)
        {
            // use getter method to get the value
            System.out.println("name : " + signal.name() +
                    " action: " + signal.getAction() + " police: " + signal.policeActionWhenNotFollowingRules());
        }
        TrafficSignal.getEnum("SLOW DOWN");
    }
}