在做银行调度系统的时候出现这个问题，各位帮忙看看问题处在哪里？
Exception in thread "pool-3-thread-1" Exception in thread "pool-1-thread-1" Exception in thread "pool-2-thread-1" Exception in thread "pool-5-thread-1" Exception in thread "pool-4-thread-1" Exception in thread "pool-7-thread-1" Exception in thread "pool-6-thread-1" java.lang.NullPointerException
        at com.niechi.interview.bank.ServiceWindow$1.run(ServiceWindow.java:27)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
        at com.niechi.interview.bank.ServiceWindow$1.run(ServiceWindow.java:27)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
        at com.niechi.interview.bank.ServiceWindow.vipService(ServiceWindow.java:46)
        at com.niechi.interview.bank.ServiceWindow$1.run(ServiceWindow.java:35)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
        at com.niechi.interview.bank.ServiceWindow$1.run(ServiceWindow.java:27)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
        at com.niechi.interview.bank.ServiceWindow$1.run(ServiceWindow.java:27)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
        at com.niechi.interview.bank.ServiceWindow.expressService(ServiceWindow.java:71)
        at com.niechi.interview.bank.ServiceWindow$1.run(ServiceWindow.java:32)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)
java.lang.NullPointerException
        at com.niechi.interview.bank.ServiceWindow$1.run(ServiceWindow.java:27)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)

我擦擦，我也遇到了这个哈哈。在照视频对对吧 一定是哪写错了

你 源码呢？

楼主找到了  NumberMachine 类中这几个有没有写new NumberManager()？
        private NumberManager commonManager;  //这错了
        private NumberManager expressManager=new NumberManager();//应该这么
        private NumberManager vipManager;//创建3个号码机
好汗啊，真像张老师说的 写代码时候不细心，查错的代价是惨重的

Nullifier 发表于 2014-9-18 23:22
楼主找到了  NumberMachine 类中这几个有没有写new NumberManager()？
        private NumberManager commonManag ...

是的，很费劲，找不到错误地方

中华教书人 发表于 2014-9-19 15:04
是的，很费劲，找不到错误地方

还没找到么？下个别人写的一点一点对照弄吧

Nullifier 发表于 2014-9-19 17:22
还没找到么？下个别人写的一点一点对照弄吧

找到了错误地方，创建号码管理器的时候，创建相同的了，复制的时候，忘记修改了！