- imported custom control "UTextFld" to Scene Builder (import JAR/FXML file)
- custom control is displayed correctly in "custom" area
- when custom control is dragged to content area, Scene Builder freezes for some seconds, after that the Scene Builder main window is automatically closed



fxml-file of custom control:

<?xml version="1.0" encoding="UTF-8"?>

<?import java.lang.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>

<fx:root type="javafx.scene.layout.HBox" xmlns:fx="http://javafx.com/fxml">
<Label text="Label1" />
<Label text="Label2" />
</fx:root>



java-file of custom control:

package com.unitechnik;

import java.io.IOException;

import javafx.fxml.*;
import javafx.scene.control.TextField;
import javafx.scene.layout.HBox;

public class UTextFld extends HBox
{
    @FXML private TextField textField;

    public UTextFld()
    {
        FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("/com/unitechnik/UTextFld.fxml"));
        fxmlLoader.setRoot(this);
        fxmlLoader.setController(this);

        try {
            fxmlLoader.load();
        } catch (IOException exception) {
            throw new RuntimeException(exception);
        }
    }
}