java - 关于try/catch块中变量范围的问题

我有一段代码可能会失败也可能不会失败，我想在放弃之前尝试X次。当它失败时，它会抛出一个特定的异常，因此我认为这样可以正常工作：

    int retries = 0;
    while (retries < MAX_RETRIES) {
        failedFlag = false;
        try {
            //...do some stuff...
            logger.info("After commit...");
            if (!failedFlag) {
                logger.info("Failed flag is false, so breaking out.");
                break;
            }
        } catch (MyException e) {
            retries++;
            failedFlag = true;
            long sleepMillis = MILLIS_TO_SLEEP * retries;
            logger.warn("Caught a failure");
            logger.warn("Will sleep for " + sleepMillis + "msec and then try again.");
            try {
                Thread.sleep(sleepMillis);
                logger.info("Done sleeping...");
                logger.info("Failed flag is " + (failedFlag ? "true" : "false"));
            } catch (InterruptedException e1) {
                logger.warn("Caught interrupted exception while sleeping.  Terminate.");
                transaction.rollback();
                return;
            }
        }
    }

我遇到的问题是，在第一个catch块中对failedFlag所做的更改似乎没有持久化。失败时，线程进入睡眠状态，但是当它唤醒并重新进入try块时，failedFlag会恢复为false吗？我得到以下日志行：

2010-09-16 17:09:48,448 WARN  [pool-1-thread-1] synchronizer.FlightCreativeSynchronizer - Will sleep for 60000msec and then try again.
...
2010-09-16 17:10:48,449 INFO  [pool-1-thread-1] synchronizer.FlightCreativeSynchronizer - Done sleeping...
2010-09-16 17:10:48,450 INFO  [pool-1-thread-1] synchronizer.FlightCreativeSynchronizer - Failed flag is true
2010-09-16 17:10:48,453 INFO  [pool-1-thread-1] synchronizer.FlightCreativeSynchronizer - After commit...
2010-09-16 17:10:48,453 INFO  [pool-1-thread-1] synchronizer.FlightCreativeSynchronizer - Failed flag is false, so breaking out.

Kinda在这里感到困惑……局部变量不受catch块中所做更改的影响吗？

最佳答案

您将在while循环的顶部将failFlag设置为false。