Using SceneBuilder to Create a User Interface - JavaFX 8: A Definitive Guide to Building Desktop, Mobile, and Embedded Java Clients - page 92

Callback<Class<?>, Object> getControllerFactory() •

void setControllerFactory(Callback<Class<?>, Object> controllerFactory) •

Charset getCharset()

•

void setCharset(Charset charset) •

ClassLoader getClassLoader() •

void setClassLoader(ClassLoader classLoader)
As you can see from this list, the location , resources , builderFactory , controllerFactory , and the
charset can also be set after the FXMLLoader is constructed. In addition, we can get and set the root , controller ,
classLoader , and get the namespace of the FXMLLoader . The root is relevant only if the FXML file uses fx:root as its
root element, in which case setRoot() must be called before the FXML file is loaded. We go into more detail about
the usage of fx:root in the next section. The controller needs to be set before the FXML file is loaded only if the
fx:controller attribute is not present in the top-level element in the FXML file. The classLoader and namespace are
mostly used internally by the FXMLLoader and usually are not called by user code.
The actual loading of the FXML file happens when one of the load() methods is called. The FXMLLoader class has
the following load methods:

•

•

<T> T load() throws IOException

•

<T> T load(InputStream input) throws IOException

•

static <T> T load(URL location) throws IOException

•

static <T> T load(URL location, ResourceBundle resources) throws IOException

•

static <T> T load(URL location, ResourceBundle resources, BuilderFactory
builderFactory) throws IOException

•

static <T> T load(URL location, ResourceBundle resources, BuilderFactory
builderFactory, Callback<Class<?>, Object> controllerFactory) throws IOException

•

static <T> T load(URL location, ResourceBundle resources, BuilderFactory
builderFactory, Callback<Class<?>, Object> controllerFactory, Charset charset)
throws IOException

The load() method with no argument can be called on an FXMLLoader instance that has all the necessary fields
already initialized. The load() method that takes an InputStream argument will load the FXML from the specified
input . All the static load() methods are convenience methods that will instantiate an FXMLLoader with the supplied
parameters and then call one of its nonstatic load() methods.
In our next example, we deliberately did not specify fx:controller in the FXML file. We also added a
one-parameter constructor to the controller class. The FXML file, the controller class, and the main class are shown
in Listings 3-4, 3-5, and 3-6.

Listing 3-4. FXMLLoaderExample.fxml
<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.geometry.Insets?>
<?import javafx.scene.control.Button?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.HBox?>
<?import javafx.scene.layout.VBox?>
<?import javafx.scene.web.WebView?>