Intro to Java Classwork: List Keeper, Part 1
Write a Java program named "ListKeeperPart1.java" that has the user
enter an unlimited number of words, which should all be stored in
an ArrayList of Strings.  The user should press the ENTER key after
each word, and then press ENTER on a line by itself (with no word)
when finished entering words.  Make sure the user's final entry
(the ENTER key by itself) is not stored in the ArrayList as a
"blank" entry.

After the user has finished entering words, perform the following
two tasks:

1) Using a complete sentence, tell the user how many words were
   entered.  This number could be zero if the user pressed the
   ENTER key without entering any words.

2) Display the list of words back to the user in the opposite of
   the order in which they were entered by the user.

For this assignment, you must keep the 'main' method as sparse as
possible, consisting of mostly (or entirely) calls to other methods.
Your code for getting the words from the user must be in its own
method, the code for telling the user how many words were entered
must be in another method, and the code for displaying the words
back to the user in reverse order must be in a third method.

Other than the 'Scanner' class, for this program you may not import
or use any external methods.  And, other than a single Java ArrayList
of Strings, you are not allowed to use any global variables in your
program.  The output of your program should be neat, organized, and
easy to understand.


As always, all of your code must be your own, written entirely and
only by you within your online CodeHS.com account.  You must never
copy/paste, receive, view, or in any way use code that was created
or modified by another person, entity, or artificial intelligence.


Advanced Option #1
Use the word number when asking the user to enter words into the
ArrayList.  For example:  "Please enter word #1:".

Advanced Option #2
Add a feature to your program that requires the user to enter at
least one word into the ArrayList.  If the user presses the ENTER
key on a line by itself before entering any words, keep asking the
user to enter a word until at least one word is in the ArrayList.

Advanced Option #3
After the list of words has been displayed, call an additional
method that displays the user's word list in order and allows
the user to delete one or more words from the list.  It is up
to you how you have the user choose which word(s) to remove from
the ArrayList.  After each word is removed, re-display the word
list to the user and allow more words to be removed.  Make sure
you never allow the ArrayList to become totally empty; the list
must always contain at least one word.