请参阅此

JavaFX FXML ComboBox demo app.对于动态数据,您可以使用类似于

Velocity的东西动态生成fxml,或者更好的是,填充ObservableList并将其提供给fxml注入的ComboBox实例.

这是演示应用程序的修改版本,它在控制器初始化程序中填充ComboBox项目的ObservableList.

fruitcombo.css

/** fruitcombo.css

place in same directory as FruitComboApplication.java

ensure build system copies the css file to the build output path */

.layout {

-fx-background-color: cornsilk;

}

#selected-fruit-frame {

-fx-border-color: burlywood;

-fx-border-width: 5;

-fx-background-color: white;

}

.bold-label {

-fx-font-weight: bold;

}

fruitcombo.fxml

FruitComboController.java

package fruit;

import java.net.URL;

import java.util.ResourceBundle;

import javafx.beans.value.ChangeListener;

import javafx.beans.value.ObservableValue;

import javafx.fxml.FXML;

import javafx.fxml.Initializable;

import javafx.scene.control.ComboBox;

import javafx.scene.control.Label;

import javafx.scene.image.ImageView;

/** JavaFX fxml controller for fruit combo fxml demo application. */

public class FruitComboController implements Initializable {

@FXML // fx:id="appleImage"

private ImageView appleImage; // Value injected by FXMLLoader

@FXML // fx:id="fruitCombo"

private ComboBox fruitCombo; // Value injected by FXMLLoader

@FXML // fx:id="orangeImage"

private ImageView orangeImage; // Value injected by FXMLLoader

@FXML // fx:id="pearImage"

private ImageView pearImage; // Value injected by FXMLLoader

@FXML // fx:id="selectedFruit"

private Label selectedFruit; // Value injected by FXMLLoader

@Override // This method is called by the FXMLLoader when initialization is complete

public void initialize(URL fxmlFileLocation, ResourceBundle resources) {

assert appleImage != null : "fx:id=\"appleImage\" was not injected: check your FXML file 'fruitcombo.fxml'.";

assert fruitCombo != null : "fx:id=\"fruitCombo\" was not injected: check your FXML file 'fruitcombo.fxml'.";

assert orangeImage != null : "fx:id=\"orangeImage\" was not injected: check your FXML file 'fruitcombo.fxml'.";

assert pearImage != null : "fx:id=\"pearImage\" was not injected: check your FXML file 'fruitcombo.fxml'.";

assert selectedFruit != null : "fx:id=\"selectedFruit\" was not injected: check your FXML file 'fruitcombo.fxml'.";

// populate the fruit combo box with item choices.

fruitCombo.getItems().setAll("Apple", "Orange", "Pear");

// bind the selected fruit label to the selected fruit in the combo box.

selectedFruit.textProperty().bind(fruitCombo.getSelectionModel().selectedItemProperty());

// listen for changes to the fruit combo box selection and update the displayed fruit image accordingly.

fruitCombo.getSelectionModel().selectedItemProperty().addListener(new ChangeListener() {

@Override public void changed(ObservableValue extends String> selected, String oldFruit, String newFruit) {

if (oldFruit != null) {

switch(oldFruit) {

case "Apple": appleImage.setVisible(false); break;

case "Orange": orangeImage.setVisible(false); break;

case "Pear": pearImage.setVisible(false); break;

}

}

if (newFruit != null) {

switch(newFruit) {

case "Apple": appleImage.setVisible(true); break;

case "Orange": orangeImage.setVisible(true); break;

case "Pear": pearImage.setVisible(true); break;

}

}

}

});

}

}

FruitComboApplication.java

package fruit;

import java.io.IOException;

import java.net.URL;

import javafx.application.Application;

import javafx.fxml.FXMLLoader;

import javafx.scene.Scene;

import javafx.scene.image.Image;

import javafx.scene.layout.AnchorPane;

import javafx.stage.Stage;

/** Main application class for fruit combo fxml demo application */

public class FruitComboApplication extends Application {

public static void main(String[] args) { launch(args); }

@Override public void start(Stage stage) throws IOException {

stage.setTitle("Choices");

stage.getIcons().add(new Image("http://files.softicons.com/download/application-icons/pixelophilia-icons-by-omercetin/png/32/apple-green.png"));

AnchorPane layout = FXMLLoader.load(

new URL(FruitComboApplication.class.getResource("fruitcombo.fxml").toExternalForm())

);

stage.setScene(new Scene(layout));

stage.show();

}

}

示例程序输出：