Int to char - char to int

I have 2 methods.
The first method takes an int from 0-256 and casts it to a char and then places the char in a string:
cCryptedString [iLoop] = (char) iCryptedValue;
The second method reads the string and casts each character from it into an int.
iPassStringValue = (int) aString.charAt(iLoop);
If the iCryptedValue in the 1st method is > 127 and < 150 (because that's as far as they will go at the moment), the casting of that int (i.e. 145) to a char results in a ? being placed in cCryptedString[iLoop].
When the 2nd method reads the string and encounters the ? placed by the first method, the casting of that char to an int results in a 63 (the ascii value of a ?) instead of the original 145.
This was not a problem until I installed and ran WebLogic 6.0 sp2 using jdk 1.3 on a Windows 2000 machine. It is working fine under WebLogic 5.1 using jdk 1.2.2.
Any ideas?
Thanks,
Mark

Here is the 1st method:
public String encryptString(String aString) {
int iPassStringValue = 0;
int iEncryptKeyValue = 0;
int iCryptedValue = 0;
char cCryptedString [] = new char[aString.length()];
for (int iLoop = 0; iLoop < aString.length(); iLoop++) {
iPassStringValue = (int) aString.charAt(iLoop);
iEncryptKeyValue = (int) sEncryptKey.charAt(iLoop);
iCryptedValue = iPassStringValue + iEncryptKeyValue;
if (iCryptedValue > 255)
iCryptedValue = iCryptedValue - 256;
cCryptedString [iLoop] = (char) iCryptedValue;
return new String(cCryptedString);
Here is the 2nd method:
public String decryptString(String aString) {
int iPassStringValue = 0;
int iEncryptKeyValue = 0;
int iDecryptedValue = 0;
char cDecryptedString [] = new char[aString.length()];
for (int iLoop = 0; iLoop < aString.length(); iLoop++) {
iPassStringValue = (int) aString.charAt(iLoop);
iEncryptKeyValue = (int) sEncryptKey.charAt(iLoop);
iDecryptedValue = iPassStringValue - iEncryptKeyValue;
if (iDecryptedValue < 0)
iDecryptedValue = iDecryptedValue + 256;
cDecryptedString [iLoop] = (char) iDecryptedValue;
return new String(cDecryptedString);
Thanks!!

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book, I would. Please don't insult yourself... by pointing out your limitations...
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http://java.sun.com/docs/books/tutorial/index.html
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