Thread: Cryptogram, help please

Need help with my cryptogram program,
the program skips over the line of code that asks for the letter you need to replace
Thank you so much


import Keyboard.*;
import java.io.*;
import java.util.*;
import java.text.*;
import java.util.Arrays;
/**
* Write a description of class SolveCryptogram here.
*
* @author Matthew Campbell
* @version 6-01-12
*/
public class SolveCryptogram
{
static final int LETTERS_IN_ALPHABET = 25;
public static void main(String args[])
throws java.io.IOException, java.text.ParseException
{
String message;
char selection, letter, replacement;
char check = 'y';

char[] messageone; //original cryptogram
char[] substitution1 = new char[LETTERS_IN_ALPHABET]; //letter from original cryptogram that you want to change
char[] substitution2 = new char[LETTERS_IN_ALPHABET]; //letter that it will change to
char[] messagetwo = new char [4096]; //decoded message
int subsMade = 0; //keeps track of how many substitutions you've made, slightly archaic in this build.
System.out.println("--- Cryptogram Helper ---");
message = Keyboard.readString("Enter cryptogram: ");
message = message.toLowerCase(); //prevents case conflicts
messageone = message.toCharArray(); //stores the original cryptogram as a char instead of a string
for(int q = 0; q < messageone.length; q++){
if (Character.isWhitespace(messageone[q])){
messageone[q] = '.'; //meant to handle spaces in the substitutions.
}
}
selection = Keyboard.readChar("(R)eplace letter or (Q)uit: ");
selection = Character.toLowerCase(selection); //prevents case conflicts
switch (selection)
{
case 'r':
System.out.println("Do not replace periods in your cryptogram."); //periods indicate spaces, this is why they're ignored
for(int i = 0; i <= LETTERS_IN_ALPHABET; i++){
letter = Character.toLowerCase(Keyboard.readChar("Letter from cryptogram: "));
substitution1[i] = letter;
System.out.println();
replacement = Character.toLowerCase(Keyboard.readChar("Replace with: "));
substitution2[i] = replacement;
check = Keyboard.readChar("Make another substitution? (y/n) ");
check = Character.toLowerCase(check); //prevent case conflicts
subsMade++;
if (check == 'y'){
i = i; //a type of do nothing
}
else{
substitution1[(i+1)] = '.';
substitution2[(i+1)] = ' '; //replaces periods into spaces
i = 30; //forces an exit out of the loop
}
}
System.out.println("Making substitutions...");
for(int l = 0; l <= message.length() - 1; l++){
int o = 0; //used to spider the substitution1 array for replacements
while(substitution1[o] != messageone[l]){
o++;
}
messagetwo[l] = substitution2[o];
System.out.println("Substituted " + substitution1[o] + " with " + substitution2[o]); //keeps track of replacements made for the user

}
System.out.println("");
for(int gh = 0; gh <= message.length() - 1; gh++){
System.out.print(messagetwo[gh]); //displays the decoded message
}
break;

case 'q':
break;
}
}
}

The project guidlines are
Enter cryptogram: ABC

(R)eplace letter or (Q)uit: r
Letter from cryptogram: A
Replace with: B

Original cryptogram: ABC
With replacements: BBC
Substitutions: A->B

(R)eplace letter or (Q)uit: r
Letter from cryptogram: B
Replace with: C

Original cryptogram: ABC
With replacements: BCC
Substitutions: A->B B->C

(R)eplace letter of (Q)uit: q