You clicked me!'); }

       
        
var myText = "This is the text of my label.";

       

...

Controllers

fx:controller

public class MyController {
    public void handleButtonAction(ActionEvent event) {
        System.out.println("You clicked me!");
    }
}

当然Controllers类还可以实现Initializable接口，以便在被加载时可以调用初始化方法initialize()

package com.foo;

public class MyController implements Initializable {
    public Button button;

    @Override
    public void initialize(URL location, Resources resources)
        button.setOnAction(new EventHandler
       
        () {
            @Override
            public void handle(ActionEvent event) {
                System.out.println("You clicked me!");
            }

前面介绍的都是通过public修饰field与方法，但是这破坏了封装性原则。由于controller是对FXML Loader可见的，所以没必要对外部开放访问权限。这样我们就必须通过@FXML注解进行修饰。

public class MyController {
    @FXML
    private void handleButtonAction(ActionEvent event) {
        System.out.println("You clicked me!");
    }
}

public class MyController implements Initializable {
    @FXML private Button button;

    @FXML
    protected void initialize()
        button.setOnAction(new EventHandler
       
        () {
            @Override
            public void handle(ActionEvent event) {
                System.out.println("You clicked me!");
            }

Nested Controllers嵌套的控制器访问。

FXMLLoader

URL location = getClass().getResource("example.fxml");
ResourceBundle resources = ResourceBundle.getBundle("com.foo.example");
FXMLLoader fxmlLoader = new FXMLLoader(location, resources);

Pane root = (Pane)fxmlLoader.load();
MyController controller = (MyController)fxmlLoader.getController();

使用FXML结合FXMLLoader自定义UI组件

通过使用元素指定root元素的类型：

自定义的UI组件：

package fxml;

import java.io.IOException;

import javafx.beans.property.StringProperty;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.control.TextField;
import javafx.scene.layout.VBox;

public class CustomControl extends VBox {
    @FXML private TextField textField;

    public CustomControl() {
        FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("custom_control.fxml"));
        fxmlLoader.setRoot(this);
        fxmlLoader.setController(this);

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

    public String getText() {
        return textProperty().get();
    }

    public void setText(String value) {
        textProperty().set(value);
    }

    public StringProperty textProperty() {
        return textField.textProperty();
    }

    @FXML
    protected void doSomething() {
        System.out.println("The button was clicked!");
    }
}

使用自定义的UI组件：

HBox hbox = new HBox();
CustomControl customControl = new CustomControl();
customControl.setText("Hello World!");
hbox.getChildren().add(customControl);

javafx之FXML初探(二)

Controllers

FXMLLoader

使用FXML结合FXMLLoader自定义UI组件