Question

What one of the following is best practice to handle Null Pointer exception?

i) int noOfStudents = line.listStudents().count;

ii) int noOfStudents = getCountOfStudents(line);

    public int getCountOfStudents(List line)
    {
 if(line != null)
        {
  if(line.listOfStudents() != null)
                {
   return line.listOfStudents().size();
  }
 }
 throw new NullPointerException("List is empty");
    }

a.

Option (i)

b.

Option (ii)

c.

Compilation Error

d.

Option (ii) gives incorrect result

Posted under Miscellaneous Topics in Java Java Programming

Answer: (b).Option (ii)

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Q. What one of the following is best practice to handle Null Pointer exception? i) int noOfStudents = line.listStudents().count; ii) int noOfStudents = getCountOfStudents(line);

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