Using TF-IDF algorithm in a text retrieval program using Java to calculate how many times a specific word or string of words appears in given documents of text.

Loop through multiple text documents returning the text name and calculation of the frequency a word or string of words appear throughout each text file.

Example: Say there are 5 documents - Example1.txt, Example2.txt, Example3.txt, Example4.txt, Example5.txt.

Output would look like:

Type a word or string of words to search for: "Java Is Fun"

Example1.txt: - Frequency:______

Example2.txt:: - Frequency::_____

Example3.txt:: - Frequency::_____

Example4.txt:: - Frequency::_____

Example5.txt:: - Frequency::_____