Thread.sleep()【针对于当前线程的睡眠】

1 Thread.sleep()

使当前执行的线程在指定的毫秒数内休眠（暂时停止执行），这取决于系统计时器和调度程序的精度和准确性，线程不会丢失任何监视器的所有权。

public class TestThreadSleep {
    public static void main(String[] args) {
        System.out.println("Main thread begin time = " + System.currentTimeMillis());
        MyThread thread = new MyThread();
        thread.start();
        try {
            Thread.sleep(10000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        System.out.println("end");
    }
}
class MyThread extends Thread{
    int i = 0;
    @Override
    public void run() {
        while (true) {
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            System.out.println("MyThread i = " + (i++));
        }
    }
}

Main thread begin time = 1605079149500
MyThread i = 0
MyThread i = 1
MyThread i = 2
MyThread i = 3
MyThread i = 4
MyThread i = 5
MyThread i = 6
MyThread i = 7
MyThread i = 8
end
MyThread i = 9
MyThread i = 10
MyThread i = 11
MyThread i = 12
...

注意：Thread.sleep() 只是使当前执行的线程在指定的毫秒数内休眠（暂时停止执行）