public class Demo1Visibility {

    int i=0;
    public boolean isRunning = true;

    public static void main(String[] args) throws InterruptedException {
        Demo1Visibility demo = new Demo1Visibility();
        new Thread(() -> {
            System.out.println("程序执行到位置1...");
            while (demo.isRunning) {
                demo.i++;
            }
            System.out.println(demo.i);
        }).start();

        Thread.sleep(3000L);
        demo.isRunning = false;
        System.out.println("程序运行结束...");
    }
}

这里有一段类似代码，只开了一个线程，但是同样System.out.println(demo.i);没有执行，这个也是内存不一致导致的吗？