Write a class called FileOperations that accepts a string value in a variable called str which represents the name of a text file residing on an external storage device. Provide the following:

a)     A constructor that accepts the string str, representing the file name, and creates a LineNumberReader object.                                                                                     [ 1 mark]

(b)    A mutator method that reads the file line by line until the file is empty.                  [ 2 marks]

(c)     An accessor method that determines if the actual file exists.                                  [ 1 mark]

(d)    An accessor method that returns the number of bytes in the file.                          [ 1mark]

(e)     An accessor method that returns the name of the file.                                          [ 1 mark]

(f)      The declaration of appropriate variables and use of Exception where necessary.    [ 2 marks]

 

Note :– a test class is NOT required

 

 

 

 

Exceptions identify errors that arise in your program. Name the two categories of exceptions that are derived directly from Throwable and differentiate between them.