不加volatile ,共享变量不是不可见吗?

public class HelloVolatile {
    private static boolean running = true;

    private static void test() {
        System.out.println("start ");
        while (running) {

        }
        System.out.println("end  ");
    }

    public static void main(String[] args) throws InterruptedException {

        new Thread(HelloVolatile::test, "t1").start();

        Thread.sleep(1000);

        running = false;
    }
}

输出结果如下

start 
end

running = false 不是在main线程修改的吗，为什么影响到了t1子线程输出了end语句，end不是应该不输出吗？？
网上还有说在while中如果加了println会影响，我这也没加

针对非static变量兄嘚