I am using AES encryption in order to ecrypt sensitive data and save
it to an XML file.
There are some sample for AES encryption at
http://www.java2s.com/Code/Java/Security/Basicsymmetricencryptionexample.htm

I need to encrypt usernames and password in my application and save
them to an XML file. In addition I need to read these usernames and
passwords later from the same XML file and show to a user in not
encrypted form.

i am trying to develop a simple program to encrypt and decrypt text in a
text file.  I am having trouble generating the key and storing the encrypted
file and then translating the ANSII/ASCII value to that letter or symbol in
the file.  any help will be greatly appreciated