LockSupport

参考文档：https://blog.csdn.net/shijiejiujiuba/article/details/79034307

神奇的使用的东西

/**
 * @Description 简单介绍一下LockSupport的使用  https://blog.csdn.net/shijiejiujiuba/article/details/79034307
 * @Author liguang
 * @Date 2022/03/10/00:15
 */
public class ThreadWattingTestOne {
    public static void main(String[] args) {
        final Thread thread1 = new Thread(() -> {
            int i = 0;
            do {
                i++;
            } while (i != 10000);
            LockSupport.unpark(Thread.currentThread());
            System.out.println("hello,world");
            LockSupport.park();
            System.out.println("hello,park");
            LockSupport.park();
        });
        thread1.start();
        try {
            thread1.join();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
    }
}

/**
 * @Description 让线程之间进行交互
 * @Author liguang
 * @Date 2022/03/10/00:15
 */
public class ThreadWattingTestTwo {
    public static void main(String[] args) {
         Thread thread1 = new Thread(() -> {
            LockSupport.park();
            System.out.println("hello,threadone............");
        });
        try {
            thread1.start();
            Thread.sleep(10000);
            LockSupport.unpark(thread1);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

    }
}

/**
 * @Description 线程如果因为调用park而阻塞的话，能够响应中断请求(中断状态被设置成true)，但是不会抛出InterruptedException。
 * @Author liguang
 * @Date 2022/03/10/00:15
 */
public class ThreadWattingThree {
    public static void main(String[] args) {
         Thread thread1 = new Thread(() -> {
            LockSupport.park();
            System.out.println("hello,threadone............");
        });
        try {
            thread1.start();
            Thread.sleep(10000);
            thread1.interrupt();
            System.out.println("hello,world");
        } catch (InterruptedException e) {
            e.printStackTrace();
        }

    }
}

处于waitting状态不会消耗CPU，但是CPU的切换需要消耗CPU

https://baijiahao.baidu.com/s?id=1712014506366682907&wfr=spider&for=pc