How to differentiate when wait(long timeout) exit

Question

Having this wait declaration:

public final native void wait(long timeout) throws InterruptedException;

It could exit by InterruptedException, or by timeout, or because Notify/NotifyAll method was called in another thread, Exception is easy to catch but...

There is any way to know if the exits cause was timeout or notify?

EDIT:

This is a tricky way that could work, (although I don't like it)

          long tBefore=System.currentTimeMillis();
          wait(TIMEOUT);
          if ((System.currentTimeMillis() - tBefore) > TIMEOUT) 
            { 
               //timeout
            }

Answer 1

There's no way to tell directly - that is, you would have to add additional code to determine this. Often when you wait(), you're waiting for something to happen which changes the state of an object in some way - e.g. by setting a boolean variable, perhaps. If that's the case, then you may be able to simply check the state of that variable to see if the event occurred, or you merely timed out. Or you can look at the value of System.currentTimeMillis() to see i the elapsed time is greater than or equal to the timeout period - if it is, that would be a clue you have probably timed out (though it's not an absolute guarantee). Or if the elapsed time is less than the timeout period then you certainly have not timed out. Does that help?