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Sanity4J was created to simplify running multiple static code analysis tools on the Java projects. It provides a single entry point to run all the selected tools and produce a consolidated report, which presents all findings in an easily accessible manner.

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NN_NAKED_NOTIFY

NN: Naked notify (NN_NAKED_NOTIFY)
 A call to notify() or notifyAll()
  was made without any (apparent) accompanying
  modification to mutable object state.  In general, calling a notify
  method on a monitor is done because some condition another thread is
  waiting for has become true.  However, for the condition to be meaningful,
  it must involve a heap object that is visible to both threads.

   This bug does not necessarily indicate an error, since the change to
  mutable object state may have taken place in a method which then called
  the method containing the notification.