fx 3adefine in java

1<?xml version="1.0" encoding="UTF-8"?>
2
3<?import javafx.scene.text.*?>
4<?import java.lang.*?>
5<?import javafx.scene.*?>
6<?import javafx.scene.control.*?>
7<?import javafx.scene.layout.*?>
8
9
10<VBox xmlns:fx="http://javafx.com/fxml/1" prefHeight="300.0" prefWidth="300.0" xmlns="http://javafx.com/javafx/8">
11    <children>
12        <fx:define>
13            <String fx:value="My radio group" fx:id="text" />
14        </fx:define>
15        <Text>
16            <text>
17                <!-- reference text defined above using fx:reference -->
18                <fx:reference source="text"/>
19            </text>
20        </Text>
21        <RadioButton text="Radio 1">
22            <toggleGroup>
23                <ToggleGroup fx:id="group" />
24            </toggleGroup>
25        </RadioButton>
26        <RadioButton text="Radio 2">
27            <toggleGroup>
28                <!-- reference ToggleGroup created for last RadioButton -->
29                <fx:reference source="group"/>
30            </toggleGroup>
31        </RadioButton>
32        <RadioButton text="Radio 3" toggleGroup="$group" />
33        
34        <!-- reference text defined above using expression binding -->
35        <Text text="$text" />
36    </children>
37</VBox>
38