Is there any way to accept only numeric values in a JTextField?

Question

Is there any way to accept only numeric values in a JTextField? Is there any special method for this?

Answer 1

This question was cited as an 'exact duplicate' of another question that has since been closed. The answers to this question were so poor that I was inspired to help out anybody that might find it later, by linking to a much better answer for this use case.

It is an answer to the closed question & can be summed up as..

Use a JSpinner instead.