How do I convert Numbers into Letters (A = 0, B = 1, C = 2, etc...)

I already have this code but i also want it to convert back to letters here is what I have.

for(int i = 0; i < key.length(); i++)

{

System.out.print( (int)key.charAt(i) - 97 +" ");

}...

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By: StackOverFlow - Friday, 9 November

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