线程虚假唤醒

class MyResource {
    private int product;

    public synchronized void produce() {
        if (product > 10) {
            System.out.println(Thread.currentThread().getName() + " 即将等待 product 已满 " + product);
            try {
                wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(Thread.currentThread().getName() + " 被唤醒 product 已满 " + product);
        }
        product++;
        System.out.println(Thread.currentThread().getName() + " 进货成功 " + product);
        // 每次都唤醒一下???
        notify();
    }

    public synchronized void consume() {

        if (product <= 0) {
        // while(product<=0){
            System.out.println(Thread.currentThread().getName() + " 即将等待 product 已空 " + product);
            
            try {
                wait();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println(Thread.currentThread().getName() + " 被唤醒product " + product);
        }
        product--;
        System.out.println(Thread.currentThread().getName() + "售货成功 " + product);
        // 每次都唤醒一下???
        notify();
    }
}

public class FalseAwakeningExample {
    public static void main(String[] args) throws InterruptedException {
        MyResource resource = new MyResource();
        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                try {
                    Thread.sleep(100);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                resource.produce();
            }
        }, "生产者1").start();

        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                try {
                    Thread.sleep(100);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                resource.produce();

            }
        }, "生产者2").start();

        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                try {
                    Thread.sleep(100);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
                resource.consume();
            }
        }, "消费者1").start();

        new Thread(() -> {
            for (int i = 0; i < 10; i++) {
                resource.consume();
            }
        }, "消费者2").start();
    }
}