Can you write this in JAVA with explaination per step to help me understand it? The INPUT file reads

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

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

EDIT: The program should be a single program i think. It needs to read the input file which contains the text (highlighted above in bold) and write it into a separate file with a number in front of each lines of text ie:

1. This file contains 2. lines of text to 3. determine if you can 4. properly read and 5. write from a file.

ALSO: please include this in pseudocode if you dont mind.