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log4j doesn't display run time null pointer error

 
Ranch Hand
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I think I got a run time null pointer error due to the line like

s.toString();

and string s was null at run time. But I can't locate this 'Null Pointer' exception message from my log4j file. I handled this exception by doing

e.printstackTrace();

where "e" is "Exception".

Is this the reason log4j doesn't record it any more ?? just because it goes to console by default ?

Please help. Thank you
 
Java Cowboy
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If you do e.printStackTrace(), the stack trace of the exception will be written to the console window, not your Log4J log file. Log4J does not automatically log exceptions or catch whatever you write to the console window. In the catch-block, you will have to write the exception message to your Log4J logger yourself.
 
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