How to add tabbed panel to Java Frame in Netbeans

Select tabbed pane, right click on it and then go to Add From Palette, and selecting another Panel(not tabbed panel again) from there to add another tab.

For renaming the tab righ click on it and choose Edit Text.

To change the tabs order you can simply right click on the panel and click on Change Order and then re-order the tabs order as you wish.