What is the TittlePanel used on the Debugger Windows

I'm trying to create a debugger and I Like to give the same Look and Feel as the IDE Debugger I want to put a tree in a title window like the Frames Variables and Watches. Can someone tellme what component is that and how I make it look nice. Also this components are separated by a splitpane but is not JSplitPane what are they using? This is the last thing I'm missing to finish my first plugin!!!!!

Thanks,
Mariano A.