It is a rather common request from application users that they want an application to not allow "unwanted" or "unparseable" characters to be entered into text input controls. For example, a TextField bound to an integer should not accept letters.

While TextFormatter is available since 8u40 and provides a basic solution to that, it is a real pain to configure, particularly in FXML-driven projects.

It would be great if a future release of JavaFX would provide predefined, locale-bound TextFormatter instances which can be referenced from FXML.

Example:

<TextField textFormatter="$INTEGER_FORMATTER" />
<TextField textFormatter="$DECIMAL_FORMATTER" />