package netease;

public class VolatileTest {

private static int number;
private static boolean ready;

private  static class ReadThread extends Thread{
public void run(){
while(!ready)
Thread.yield();
System.out.println(number);
}
}


public static void main(String[] args) throws InterruptedException {
// TODO Auto-generated method stub
new ReadThread().start();
number = 42;
ready = true;
}

}

1) 上面的代码输出什么，并说明原因？
2）若ready是volatile修饰，输出什么，说明原因？

package netease;

public class VolatileTest {

private static int number;
private static boolean ready;

private  static class ReadThread extends Thread{
public void run(){
while(!ready)
Thread.yield();
System.out.println(number);
}
}


public static void main(String[] args) throws InterruptedException {
// TODO Auto-generated method stub
new ReadThread().start();
number = 42;
ready = true;
}

}

1) 上面的代码输出什么，并说明原因？
2）若ready是volatile修饰，输出什么，说明原因？