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Query on null pointer Exception

 
Greenhorn
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I am getting Nullpointer exception. could someone please help in letting me know how to fix it.
 
Sheriff
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First step is to find out what line of code is throwing the exception. The stack trace will tell you that -- and I see that your code is printing the stack trace for you.

(This isn't a Scala question, so I'm moving it to a better forum.)
 
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