JDeveloper's free Java Profilers in Action
By Shay Shmeltzer-Oracle on Nov 28, 2006
One of my sessions at Oracle Open World this year was about "Better Java Code", and one of the demos I showed there was how to use the built-in profilers in JDeveloper to tune your application.
For those who didn't made it to the conference here is the part of the demo that shows you how they work:
By the way, just like the rest of JDeveloper these are provided for FREE, so even if you don't use JDeveloper for coding but you need some help tuning the code you created you can use it).