I have a problem using javafx & scenebuilder.

So as I was creating a form, and wanted to create a register and login function. I have already created a register function but was stuck at creating a function which read from 2 different text files and login.

So like in the picture, I have 2 radio buttons, and I want to and choose between and login. There is 2 text files named children.txt and parent.txt.

Information inside are saved as string seperated with a comma.

How do I create a function that checks the login depending on which radio is selected.

Parent Email Children Password LOGIN 1 Name, email1@mail.com, 123456 2 Zach, email2@mail.com, 12345678