How to force a double input in a TextField in JavaFX?

Question

How to make sure an user inputs only double values in a given TextField?

I found a solution for integers bu I can\'t manage to use it for doubles.

Answer 1

You could make use of Double.parseDouble Double Javadoc. This will do the parsing for you, rather than writing your own double validation. You can then check for a number format exception or null pointer exception.

    try
    {
        Double.parseDouble(newValue);
        // Valid double
    }
    catch (NullPointerException | NumberFormatException ex)
    {
        // Not valid double
    }