Berkeley CSUA MOTD:Entry 41480
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2025/07/08 [General] UID:1000 Activity:popular
7/8     

2006/1/23-25 [Computer/SW/Languages/Java] UID:41480 Activity:nil
1/23    I'm trying to make somebody else's code thread-safe and it seems like
        my synchronization blocks are not being respected.  Does anyone know
        a problem with this code?
        class FooPoller {
          protected static Boolean lock = new Boolean(true);
          private static void poll() {
            // do some stuff
            synchronized(lock) {
              // modify some static member objects
            }
          }
          Public void addToList(Vector addable) {
            // do some stuff
            synchronized(lock) {
             // modift some static member objects
            }
          }
        }
        I then have one thread calling FooPoller.poll() in a loop, while some
        other thread is calling addToList() on an instance of a subclass of
        FooPoller.  Do the instance method and the static method see a
        different lock?  Do the base class and the subclass see a different
        lock?  This is really stumping me. -dgies
        \ What Java version? Perhaps something weird is happening
          with Boolean autoboxing if >=1.5. Try an Object instance
          as the lock. - gojomo
        \_ did you revolve this?
2025/07/08 [General] UID:1000 Activity:popular
7/8     

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