From Forum Nokia Wiki

ID	KIJ000693	Creation date	June 25, 2007
Platform	S60 3rd Edition	Devices	SW version(s)
Category	Java	Subcategory	MIDP1.0/2.0

Keywords (APIs, classes, methods, functions):

Overview

When TextField.DECIMAL is used to enter numbers, the comma character is used on some devices/language variants as the decimal point symbol instead of the point character.

Description

When the user enters numbers to a textField.DECIMAL-type textfield, some locales use the comma as the decimal pointer instead of the point.  This can cause some confusion if it is not taken into consideration when writing applications.

How to reproduce

Insert a text field of decimal type, enter a number, and try adding a decimal point.

Solution

If "hardcoded" numbers are also used in, for example, calculations, they must use point instead of comma – otherwise an exception will be thrown.