I am writing a program class to decode a string of input from a user. I need it to take the integer and return the ASCII charcater coresponding to that int. (i.e. 77=M). Belwo is the code I have so far. Can someone lead me in the right direction to correct my code?

Code:
/*LetterDecode class for LetterCode main program*/

import tio.*;    //uses the tio package from the book
import java.lang.*; // for length
...