I have a question about graphic interfaces

I am trying to make my graphical interface have a button that when I click it will be able to open a new interface that is backward compatible with the first one, but when I tried to do it I got a question that is what I want to talk about. can you make a graphical interface inside an if? I don't know if they can understand me well but that was all thanks

java

11th Jun 2020, 5:46 PM

Jcrex