大家来参与上

大家来参与下！
同志们，下面这段代码在你们机器上输出什么？请亲自测试后再回复！！

Java code

public class Test{    private static boolean ready;    private static int number;        private static class ReaderThread extends Thread    {        public void run()        {            while(!ready)            {                Thread.yield();            }            System.out.println(number);        }    }    /**     * @param args     * @throws InterruptedException      */    public static void main(String[] args) throws InterruptedException {        // TODO Auto-generated method stub        new ReaderThread().start();        Thread.sleep(1000);        number = 42;        ready = true;    }}