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The following method takes in a list of generic objects and returns the number of items in the list. As written, however, the method will...
The following method takes in a list of generic objects and returns
the number of items in the list. As written, however, the method
will produce a null pointer exception if null
is passed in as
the parameter value.
Add an if statement to the method that will check for a null
parameter value and, if so, return -1 instead of producing a
null pointer exception.
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