Please do in java as simply as possible with code available for copy and comments

Write a program that reads a file (provided as attachment to this assignment) and writes the file to a different file with line numbers inserted at the beginning of each line. Throw an exception if the file does not exist. An error message should result.

For example if file input is: This is a test File output should be

1. This is a test

I cant seem to attach the file, because it is a .txt but it reads:

This file contains lines of text to determine if you can properly read and write from a file.

let me know if you have any questions!