public class Peterson {

    static int tour = 0;
    static boolean[] demande = { false, false };

    public static void main(String[] args) {
        Thread t1 = new Thread(new Proc(), "1");
        Thread t2 = new Thread(new Proc(), "0");
        t1.start();
        t2.start();
    }
}

class Proc implements Runnable {
    int id; // identifiant du Thread
    int di; // identifiant de l'autre Thread

    public void run() {
        id = Integer.parseInt(Thread.currentThread().getName());
        di = (id + 1) % 2;

        while (true) { // SC = Section Critique
            System.out.println("Thread " + id + " est hors SC");
            entrer();
            System.out.println("Thread " + id + " est en SC");
            sortir();
        }
    }

    synchronized void entrer() {
        System.out.println("Thread " + id + " veut entrer en SC ");
        Peterson.demande[id] = true;
        Peterson.tour = di;
        while ((Peterson.tour != id) && (Peterson.demande[di])) {
            System.out.println(
                    (char) 27 + "[0;90m" + "Thread " + id + " attend la fin SC du Thread " + di + (char) 27 + "[0m");
        }
        System.out.println("Thread " + id + " est entré en SC ");
    }

    synchronized void sortir() {
        System.out.println("Thread " + id + " veut sortir de SC ");
        Peterson.demande[id] = false;
        System.out.println("Thread " + id + " est sortit de SC ");
    }
}