Thread communication: wait, wake up

Key points: effective utilization of resources

Take hot dry noodles as an example (problems of producers and consumers):

class Hot and dry noodles {
    int isOK = 0;
}
class Producer implements Runnable {
    //Hot dry noodles m;
    public Producer(Hot and dry noodles m) {
        this.m = m;
    }
    public void Make face() {
        try {
            synchronized (m) {
                if (m.isOK > Desk.BUFFER_MAX) {
                    System.out.println("+Do it when you need to");
                    m.wait();
                    System.out.println("+Start doing");
                }
                m.isOK++;
                System.out.println("+Make face" + m.isOK);
                m.notify();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    public void run() {
        while (true) {
            try {
                Thread.sleep(Desk.Face time);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            //Make face (); / / production face
        }
    }
}
class Consumer implements Runnable {
    //Hot dry noodles m;
    public Consumer(Hot and dry noodles m) {
        this.m = m;
    }
    public void Eating noodles() {
        try {
            synchronized (m) {// #Lock face objects
                if (m.isOK <= 0) {
                    System.out.println("------Equal surface");
                    m.wait();// Wait, release lock
                    System.out.println("------There are faces.");
                }
                System.out.println("------Eating noodles:" + m.isOK);
                m.isOK--;
                m.notify();// Wake up another thread, but both threads wait for CPU execution
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
    public void run() {
        while (true) {
            try {
                Thread.sleep(Desk.Eating time);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            //Eat noodles ();
        }
    }
}
class Desk {// In order to manage objects and simulate real scenes, you can not
    public static final int Face time = 100;
    public static final int Eating time = 100;
    public static final int BUFFER_MAX = 1;
    //Hot dry surface msg = new hot dry surface ();
    //Producer m = new producer (msg);
    //Consumer c = new consumer (msg);
    Thread t1 = new Thread(m); // Producer thread
    Thread t2 = new Thread(c); // Consumer thread
    public void fn() {
        t1.start();
        t2.start();
    }
}
public class Producer consumer issues {
    public static void main(String[] args) {
        Desk d = new Desk();
        d.fn();
    }
}