Java：volatile在32位JDK和64位JDK上表现不同，64位更体现其价值

public class VolatileVisible {
 boolean running = true; //
 void m() {
 System.out.println(“m start”);
 while(running) { //

       }
       System.out.println("m end");
   }
   public static void main(String[] args) {
       VolatileVisible vt = new VolatileVisible();
       new Thread(vt::m,"t1").start();
       try {
           Thread.sleep(1000);
       } catch (InterruptedException e) {
           e.printStackTrace();
       }
       vt.running = false;  
   }
}