Exception in AES decryption algorithm in java

Question

I got an exception in the following code for AES algorithm in java.

Code decryptes an encrypted string and returns the original string.

Plz help me to fix t

Answer 1

Your code manages to get almost everything wrong. Just for a start, your mistakes include:

1. generating a new random symmetric key before encryption and decryption. You have to use the same key to decrypt that was used to encrypt.
2. Using String as a container for binary data. cipher output is cannot be reliably made into a String unless you use an encoding, such as base64.
3. Your exception handling is incorrect.

Furthermore, your code runs without exceptions for me.