This program was using the code provided from Youtuber: 'Bro Code',
from video titled 'Java encryption program'
https://www.youtube.com/watch?v=jjcJCvIoj2M&list=PLZPZq0r_RZOMhCAyywfnYLlrjiVOkdAI1&index=90
The code is able to do four main things: Create a new key, Get/view key, Encrypt a message, Decrypt a message.
The code creates a code by using characters from ASCII code: 32 to 127
The code is shuffled using 'Collections.shuffle(arrylist);' code, and the new key corresponds to different character each time it is shuffled(new key generated)