> adding doing the loop using the unicode of java
> for example 97 is a and 98 is b
This is something similar you described in another thread. Don't cross post simular question.
Like I said in another thread of yours: it's better to post these questions in the Fundamentals forum. If you post them there please try to write full English sentences. I found your questions hard to read without punctuation marks.
While you're at it: I don't think a lot of people are willing to do your homework, but they are willing to help you improve your own code and/or answer specific questions about your code. So post some of your own code and tell us where you're stuck.
Good luck.