Светофор_Just4Fun

enum TrafficLightChange{
    GREEN, YELLOW, RED
}

class TrafficLightChangeSimulator implements Runnable{

    TrafficLightChange tlc;
    private boolean stop=false;
    private boolean change=false;

    TrafficLightChangeSimulator(TrafficLightChange tl){
        tlc=tl;
    }
    TrafficLightChangeSimulator(){

        tlc=TrafficLightChange.RED;
    }

    public void run(){
        while (!stop) {
            try {
                switch (tlc) {
                    case GREEN:
                        Thread.sleep(10000);
                        break;
                    case YELLOW:
                        Thread.sleep(3000);
                        break;
                    case RED:
                        Thread.sleep(12000);
                        break;
                }
                changeColor();

            } catch (InterruptedException exc) {
                System.out.println("Прерывание потока");
            }
        }
    }

    synchronized void changeColor(){
        switch (tlc){
            case GREEN:
                tlc=TrafficLightChange.YELLOW;
                break;
            case YELLOW:
                tlc=TrafficLightChange.RED;
                break;
            case RED:
                tlc=TrafficLightChange.GREEN;
                break;
        }
        change=true;
        notify();
    }

    synchronized void waitChangeColor() {
        try {
           while(!change) wait();
            change = false;
        }catch (InterruptedException exc){
            System.out.println(exc);
        }
    }

    synchronized TrafficLightChange getColor(){
        return tlc;
    }

    synchronized void cancel(){
        stop=true;
    }



}
public class ShowFile{
    public static void main(String args[]) {
        TrafficLightChangeSimulator t1=new TrafficLightChangeSimulator(TrafficLightChange.GREEN);
        Thread mt=new Thread(t1);
        mt.start();

        for(int i=0; i<9;i++){
            System.out.println(t1.getColor());
            t1.waitChangeColor();
        }
        t1.cancel();
    }
}