how to detect the type of the inpout are string ou no in javafx

Question

Javafx

Answer 1

You can find some ideas here:
https://stackoverflow.com/questions/7555564/what-is-the-recommended-way-to-make-a-numeric-textfield-in-javafx

Generally if you just want to validate that an input field contains only numeric digits, you can match it against a regular expression such as "\d+"

Answer 2

Please send me the code that solves the problem, I don't understand yet