Why does my mouse cursor stick as the default arrow instead of a text selector?
Try editing the NetBeans source code. I'm not an expert on Java GUIs, but there should be a setCursor() function you can put into onHover or something like that. Check the documentation of the GUI toolkit NetBeans uses.

(@tubedogg, Chrome doesn't use a native GUI. Although it tries its best to use the OS look, the title bar is custom, which you can't do with Apple's native GUI toolkit.)