In a jsp i'm calling PBEUtils to encrypt a password, but the class returns the encrypted password in the stderr.

For example in the jsp I have the following

String[] input = {"KJKdjkw1","50","nn32kF*vn3","fubar1234"};

PBEUtils.main(input);

The  output is 16:15:38,574 ERROR [STDERR] Encoded password: 2ELTO5EQXKjjCADxkwavrO

How do I grab it from the stderr?