It gives an error if radio buttons are not selected,Whatt can i do?

I add it to jtable row using using btnGrpGender.getSelection().getActionCommand() and I've already set an action command to radio buttons but when nothing selected it gives an error

https://stackoverflow.com/questions/67352875/it-gives-an-error-if-radio-buttons-are-not-selected-whatt-can-i-do May 02, 2021 at 12:01PM