commenting a line in Netbeans

commenting a line in Netbeans ? Try this

Ctrl + Shift + C

Source : https://netbeans.org/project_downloads/usersguide/shortcuts-80.pdf

How to Group your Radio Buttons

First add your Radio Buttons to the panel and then select all radio buttons you want to group and set their buttonGroup property (choose the group name from the combo box).

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.