JUnit is the de-facto standard for
Java unit testing, with lots of tool support and a huge community. There are also extensions for performance testing, but I've never used them, so I can't comment.
The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - Heraclitus