我正在学习为JavaFX 8和Scene Builder编写FXML自定义组件。
我编写了下面的FXML文件,但是Scene Builder无法打开它,给出了“打开操作失败”消息,并由于以下异常而产生:
java.io.IOException: javafx.fxml.LoadException: mycustomcomponent.TicoTeco不是有效类型。 /C:/Users/xxxxx/Documents/NetBeansProjects/MyCustomComponent/src/mycustomcomponent/TicoTeco.fxml:9 at com.oracle.javafx.scenebuilder.kit.fxom.FXOMLoader.load(FXOMLoader.java:92) at com.oracle.javafx.scenebuilder.kit.fxom.FXOMDocument.(FXOMDocument.java:80) at com.oracle.javafx.scenebuilder.kit.fxom.FXOMDocument.(FXOMDocument.java:95) ...
为什么会出现此异常?
以下是FXML文件:
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<fx:root type="mycustomcomponent.TicoTeco" prefHeight="93.0" prefWidth="304.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1">
<children>
<BorderPane layoutX="61.0" prefHeight="115.0" prefWidth="200.0">
<left>
<Button fx:id="tico" mnemonicParsing="false" text="Tico" BorderPane.alignment="CENTER" />
</left>
<right>
<Button fx:id="teco" mnemonicParsing="false" text="Teco" BorderPane.alignment="CENTER" />
</right>
</BorderPane>
</children>
</fx:root>
以下是TicoTeco.java和Main.java的Java文件:
package mycustomcomponent;
import java.io.IOException;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.control.Button;
import javafx.scene.layout.AnchorPane;
public class TicoTeco extends AnchorPane {
@FXML
Button tico;
@FXML
Button teco;
public TicoTeco() throws IOException {
FXMLLoader fxmlLoader = new FXMLLoader(TicoTeco.class.getResource("TicoTeco.fxml"));
fxmlLoader.setRoot(this);
fxmlLoader.setController(this);
fxmlLoader.load();
}
@FXML
public void initialize() {
final EventHandler<ActionEvent> onAction =
event -> System.out.println("Hi, I'm " + (event.getSource() == tico? "Tico" : "Teco") + "!");
tico.setOnAction(onAction);
teco.setOnAction(onAction);
}
}
package mycustomcomponent;
import java.io.IOException;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
public class Main extends Application {
@Override
public void start(Stage primaryStage) throws IOException {
Scene scene = new Scene(new TicoTeco());
primaryStage.setTitle("Here are Tico and Teco!");
primaryStage.setScene(scene);
primaryStage.show();
}
/**
* @param args the command line arguments
*/
public static void main(String[] args) {
launch(args);
}
}