Variation of Caesar Cipher.
How to use the Cipher App:
Run the main function in Main.java. Make sure a new window called 'Cipher App' opens.
Enter a positive integer as a shift. The shift shifts the uppercase and lowercase letters in the alphabet. It increments by 1 for every symbol in the input message. Example: Encrypt ABC with shift 1 -> BDF, Decrypt ABC with shift 1 -> ZZZ
Enter the message into the input text area that you want to encrypt or decrypt.
Press the Encrypt/Decrypt button.
Obtain the results in the output text area.