encoding « hexadecimal « Java Data Type Q&A

1. Getting the original secretkey from hex format    stackoverflow.com

This is the hex format of a secret key used for AES encryption

Can i generate the original SecretKey format or byte array from this? If so how?

2. Unable to decode hex values in javascript tooltip    stackoverflow.com

I have quite the process that we go through in order to display some e-mail communications in our application. Trying to keep it as general as possible... -We make a request ...

3. Apache Commons Hex Encoding Error    stackoverflow.com

I'm trying to use org.apache.commons.codec.binary.Hex to encode and decode a String value: e.g.:

However, this is not giving me a hexadecimal output, but outputs similar to this:
Any ideas why ...