Description
Objective
To build a complete working Java program that offer practice with Java string manipulation.
Overview & Instruction
Write a Java program that performs encryption of a given prioritized message.
The chosen encryption routine requires a one-word key known by both the sender and receiver. The letters
of the key are used to shift the characters of the message. For example if the key is: MATH, and the
message is: Delta College is open., the encryption would be:
DELTACOLLEGEISOPEN Capitalize the message and remove spaces and punctuation.
MATHMATHMATHМАТНМА Repeat the key as needed and align with characters of message.
PEEAMCHSXEZLUSHWON The encrypted message. Note that ‘A’ shifts zero positions, ‘B’ shifts one
position, and so on through ‘Z’ that shifts 25 positions. If the shifting rolls past
the end of the alphabet, then it must “wrap around” (i.e. ‘Z’ shifts next to ‘A’,
etc.)
You are only responsible for the encryption routine. Assume another team is handling the decryption.
The behavior of your program should include a simple input via a dialog box. This could be an example:
Mëssage: P, Delta College is closed.
Key: MATH
All messages should be prefaced with one of four possible characters priority codes:
Z-FLASH O- IMMEDIATE P- PRIORITY R- ROUTINE
These decrease in criticality as your read left-to-right. FLASH implies life or death urgency, while ROUTINE
of course deals with messages in accords to its name.
Output from the example above there would be:
PRIORITY
PEEAMCHSXEZLUSHWỒN
A legitimate message can only include one of the four valid characters, exactly one comma, and then one or
more characters following the comma. Also, the key must be one capitalized word of at least four
characters in length. Be sure to include an error message if these basic formatting requirements are not
followed for the input strings.
