Is this what you were looking for? This works fine for me.
package numerictextfield;
import java.util.regex.Pattern;
import javafx.scene.control.IndexRange;
import javafx.scene.control.TextField;
public class NumericTextField extends TextField {
private final Pattern intPattern = Pattern.compile("[0-9]*");
public NumericTextField(String text) {
super(text);
}
public NumericTextField() {
super();
this.insertText(0, "");
this.replaceSelection("");
this.replaceText(new IndexRange(0, 0), "");
this.replaceText(0, 0, "");
}
@Override
public void insertText(int index, String text) {
if (intPattern.matcher(text).matches()) {
super.insertText(0, text);
}
}
@Override
public void replaceSelection(String text) {
if (intPattern.matcher(text).matches()) {
super.replaceSelection(text);
}
}
@Override
public void replaceText(IndexRange range, String text) {
if (intPattern.matcher(text).matches()) {
super.replaceText(range, text);
}
}
@Override
public void replaceText(int start, int end, String text) {
if (intPattern.matcher(text).matches()) {
super.replaceText(start, end, text);
}
}
}
and then
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.layout.AnchorPane?>
<?import numerictextfield.NumericTextField?>
<AnchorPane xmlns:fx="http://javafx.com/fxml" >
<NumericTextField text="12345" >
<AnchorPane.rightAnchor>65.0</AnchorPane.rightAnchor>
</NumericTextField>
</AnchorPane>