Okay, so.. I have never ever done anything with programming so yeah.. This is getting a bit confusing and I can't get an answer to this.

I want to make a program on java that will replace letters, a friend told me it's pretty easy but he hasn't got time to do it, so he told me to try it...
Um, let's say I'm doing good at it. :P

It should just be like
(EXAMPLE):
a = 3
b = l
c = 5

And so on...
Anyone there willing to help me? x_x