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Start your free trialMary McCallum
5,483 PointsWhat is a Null Pointer Exception?
This course runs through the examples of using exceptions in unit testing. But so far it has not explained clearly what exactly Exceptions are or what a Null Pointer Exception is? Can somebody explain? I'm going through the motions of doing the exercises but it hasn't clearly explained the theory behind it.
2 Answers
Bramyn Payne
19,589 PointsThis is an Exception that is thrown when you are trying to do something with a null value. This could be trying to take the length of a null
object or trying to access the field of a null
object.
These links from Oracle and GeeksforGeeks do a good job to explain it in more detail.
I hope this helps!
Mary McCallum
5,483 PointsThanks Bramyn!