How to set the floating point symbol in JSpinner to dot instead of comma if the locale is french?

Question

I am making a Java application localized in French. I used some JSpinners that accept only a float.

The problem is that the decimal point (the separator between integer part and decimal part) in float numbers is represented by a comma (,). This behavior make a number like 12.34 invalid and the JSpinner reject it, but If I type 12,34 it will be accepted.

How can I force a JSpinner to use a dot (.) as the decimal point and not the comma ?

The main method begin like this :

public static void main(String args[]) {
   Locale.setDefault(Locale.FRENCH); // Set French as the application language
   /* ... */
}

Okay, when I use `Locale.setDefault(Locale.FRENCH)`, it displays a space instead of `,` or a `.` — MadProgrammer, Aug 28 '15 at 00:17

Hamza Abbad · Accepted Answer · 2015-09-01T18:12:59.010

I found the solution. When you use the method Locale.setDefault(Locale) it sets the default locale for display and also for formatting, but in my case, I need only to display my user interfaces in French. For that, I have to use also the second overload of the method : setDefault(Locale.Category, Locale), where the first parameter indicate if I want to use the locale for displaying user interfaces or for formatting date, numbers or curencies. The main method now is like this :

Locale.setDefault(Locale.FRENCH); // Display the user interfaces in French
Locale.setDefault(Locale.Category.FORMAT, Locale.ENGLISH); // But the formatting in English

How to set the floating point symbol in JSpinner to dot instead of comma if the locale is french?

1 Answers1