应用程序启动方法java.lang.Reflect.InvocationTargetException JavaFX图像转换中出现异常

Question

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.image.Image?>
<?import javafx.scene.image.ImageView?>
<?import javafx.scene.layout.StackPane?>


<StackPane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="574.0" xmlns="http://javafx.com/javafx/8.0.101" xmlns:fx="http://javafx.com/fxml/1">
   <children>
      <ImageView fitHeight="450.0" fitWidth="560.0" pickOnBounds="true" preserveRatio="true">
         <image>
            <Image url="@loader.png" />
         </image>
      </ImageView>
   </children>
</StackPane>

<?xml version="1.0" encoding="UTF-8"?>

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.TextField?>
<?import javafx.scene.layout.AnchorPane?>

<AnchorPane id="AnchorPane" prefHeight="462.0" prefWidth="473.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/8.0.101" fx:controller="finalf.FXMLDocumentController">
    <children>
        <Button fx:id="button" layoutX="126.0" layoutY="225.0" onAction="#handleButtonAction" prefHeight="31.0" prefWidth="212.0" text="Play" />
        <Label fx:id="label" layoutX="126" layoutY="120" minHeight="16" minWidth="69" />
      <Button layoutX="126.0" layoutY="312.0" mnemonicParsing="false" prefHeight="31.0" prefWidth="212.0" text="Instructions" />
      <TextField layoutX="126.0" layoutY="141.0" prefHeight="31.0" prefWidth="212.0" />
    </children>
</AnchorPane>

FXMLDocumentController.java

package finalf;

import java.io.IOException;
import java.net.URL;
import java.util.ResourceBundle;
import java.util.logging.Level;
import java.util.logging.Logger;
import javafx.animation.FadeTransition;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.fxml.Initializable;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Label;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;
import javafx.util.Duration;

public class FXMLDocumentController implements Initializable {

    @FXML
    private Label label;

    @FXML
    private AnchorPane root;

    @FXML
    private void handleButtonAction(ActionEvent event) {
       try{
       FXMLLoader fxmlLoader = new FXMLLoader(getClass().getResource("Second_Window.fxml"));
       Parent rootl = (Parent) fxmlLoader.load();
       Stage stage = new Stage();

       stage.setTitle("Foker");
       stage.setScene(new Scene(rootl));
       stage.show();
       }catch(Exception e){
        System.out.println("Can't load new window");
       }
    }


    private void loadSplashScreen() throws IOException{
      StackPane pane = FXMLLoader.load(getClass().getResource("/SplashFXML.fxml"));
      root.getChildren().setAll(pane);
      FadeTransition fadeIn = new FadeTransition(Duration.seconds(3),pane);
      fadeIn.setFromValue(0);
      fadeIn.setToValue(1);
      fadeIn.setCycleCount(1);

      fadeIn.play();

    }

    @Override
    public void initialize(URL url, ResourceBundle rb) {
        try {
            loadSplashScreen();
        } catch (IOException ex) {
            Logger.getLogger(FXMLDocumentController.class.getName()).log(Level.SEVERE, null, ex);
        }
    }    

}

finalf.java

package finalf;

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.fxml.FXML;
import javafx.fxml.FXMLLoader;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.stage.Stage;


public class FinalF extends Application {

    @FXML
    private Button button;

    @FXML
    private Label label;

    @FXML
    void handleButtonAction(ActionEvent event){


    }

    @Override
    public void start(Stage stage) throws Exception {
        Parent root = FXMLLoader.load(getClass().getResource("FXMLDocument.fxml"));

        Scene scene = new Scene(root);

        stage.setScene(scene);
        stage.show();
    }


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

}

Answer 1

让我们试试

1. 在fxmlDocumentController.java中，更改LoadSplashScreen()方法中的第一行，

从

StackPane pane = FXMLLoader.load(getClass().getResource("/SplashFXML.fxml"));

StackPane pane = FXMLLoader.load(getClass().getResource("SplashFXML.fxml"));

AnchorPane id="AnchorPane" prefHeight="462.0" prefWidth="473.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/8.0.101" fx:controller="finalf.FXMLDocumentController"

AnchorPane id="AnchorPane" fx:id="root" prefHeight="462.0" prefWidth="473.0" xmlns:fx="http://javafx.com/fxml/1" xmlns="http://javafx.com/javafx/8.0.101" fx:controller="finalf.FXMLDocumentController"