10.1小节中（p258-259）这么一段代码
public class Section01Demo0002 {
// 创建一个CountDownLatch实例
private static final j**a.util.concurrent.CountDownLatch countDownLatch = new j**a.util.concurrent.CountDownLatch(2);

public static void main(String[] args) throws InterruptedException {
    j**a.util.concurrent.ExecutorService executorService = j**a.util.concurrent.Executors.newFixedThreadPool(2);
    // 将线程A添加到线程池
    executorService.submit(() -> {
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            countDownLatch.countDown();
        }
        System.out.println("child threadA over");
    });
    // 将线程B添加到线程池
    executorService.submit(() -> {
        try {
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            countDownLatch.countDown();
        }
        System.out.println("child threadB over");
    });
    System.out.println("wait all child thread over");
    // 等待子线程执行完毕
    countDownLatch.await();
    System.out.println("all child thread over");
    executorService.shutdown();
}

我们本地执行的结果是
wait all child thread over
child threadA over
all child thread over
child threadB over

Process finished with exit code 0

有时也会出现您书中所写的
wait all child thread over
child threadB over
child threadA over
all child thread over

Process finished with exit code 0

子线程执行完countDownLatch.countDown();后它的时间片用完了，主线程获取到了时间片先输出了，然后子线程又获取到了时间片，继续输出，才有了这样结果，应该把System.out.println(“child threadA over”);放到countDownLatch.countDown();前面，虽然能解决，但是也有问题，没阻塞前就被输出了。
前面的例子也有这样的问题，这两个例子都是同样情况。

我从当当买了您的书，写的很棒，请问有没有书中例子的源代码呀？

在书中的147页，对于cachedHoldCounter的描述不准确，书中说是进入重入锁的次数，那数据类型应当与前面对firstReaderHoldCount的类型一致，但是对于cachedHoldCounter是HoldCounter对象，虽然其中有重入的次数，但是也还有线程的Id（tid）

64页代码中static final Unsafe unsafe； 去掉final；代码static final long stateOffset去掉 final

有没有随书代码呀？