Problem with Decoding

[UnLinux]

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?

/*LetterDecode class for LetterCode main program*/

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

class LetterDecode {
    public static void main(String[] arguments) {
        String d;
        int [] buffer;
        int d;
                        
        System.out.print("What is your message you wish to decode? (Numbers & Spaces Only): ");
            d = Console.in.readLine();
            buffer = d.toIntArray;
            for (int i = 0; i < d.length(); i++)
            System.out.print(integer.parseInt(buffer[i] + " "));

[D_C]

int i = 77;
String s = "";
s += i;
System.out.println(s);

It is already implemented. I think you can call it explicitly as i.toString().