I created a JavaFX application that is nearly completed. I exported it as a runnable JAR. When opening this JAR I only see a blank window. i followed some other answers from stackoverflow but I did not get it working. It works only in the Eclipse IDE!
My screens controller:
package gui;
import java.io.File;
import java.net.URL;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Set;
import javafx.fxml.FXMLLoader;
import javafx.scene.Node;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.layout.StackPane;
public class ScreensController extends StackPane {
private HashMap<String, Node> screens = new HashMap<>();
public static String sourcePath = "";
private CoreService coreService;
public ScreensController(){
super();
}
public void addScreen(String name, Node screen) {
screens.put(name, screen);
}
public boolean loadScreen(String name, String resource) {
System.out.println("ID: "+name);
System.out.println("Resource: "+resource);
String file = System.getProperty("user.dir")+"\\bin\\"+resource;
// System.out.println(file);
try {
FXMLLoader myLoader = new FXMLLoader();
File f = new File(file);
URL url = f.toURI().toURL();
myLoader.setLocation(url);
// System.out.println("Location: "+myLoader.getLocation());
Parent loadScreen = (Parent) myLoader.load();
ControlledScreen myScreenControler =
((ControlledScreen) myLoader.getController());
myScreenControler.setScreenParent(this);
addScreen(name, loadScreen);
System.out.println("Anzahl Screens: "+screens.size());
return true;
}catch(Exception e) {
System.out.println("Fehler beim Laden von "+file);
System.out.println(e.getMessage());
return false;
}
}
public boolean setScreen(final String name) {
@SuppressWarnings("unused")
Node screenToRemove;
if(screens.get(name) != null){ //screen loaded
if(!getChildren().isEmpty()){ //if there is more than one screen
getChildren().add(0, screens.get(name)); //add the screen
screenToRemove = getChildren().get(1);
getChildren().remove(1); //remove the displayed screen
}else{
getChildren().add(screens.get(name)); //no one else been displayed, then just show
}
return true;
}else {
System.out.println("Screen hasn't been loaded!!! \n");
return false;
}
}
public boolean unloadScreen(String name) {
if(screens.remove(name) == null) {
System.out.println("Screen didn't exist!!!");
return false;
} else {
return true;
}
}
public void print() {
Set<String> keys = screens.keySet();
Iterator<String> it = keys.iterator();
while (it.hasNext()){
System.out.println("Key: "+it.next());
}
}
public CoreService getCoreService(){
return this.coreService;
}
public void setCoreService(CoreService coreService){
this.coreService = coreService;
}
}And here I use it:
package gui;
import java.util.Optional;
import javafx.application.Application;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Scene;
import javafx.scene.control.Alert;
import javafx.scene.control.Button;
import javafx.scene.control.ButtonType;
import javafx.stage.Modality;
import javafx.stage.Stage;
import javafx.stage.WindowEvent;
public class MainMenu extends Application {
private Stage mainStage;
private static CoreService coreService;
public static final String MAIN_SCREEN = "main";
public static final String MAIN_SCREEN_FXML = "gui\\MainMenu.fxml";
@Override
public void start(Stage primaryStage) {
this.mainStage = primaryStage;
ScreensController mainContainer = new ScreensController();
mainContainer.loadScreen(MainMenu.MAIN_SCREEN, MainMenu.MAIN_SCREEN_FXML);
mainContainer.setCoreService(MainMenu.coreService);
mainContainer.setScreen(MainMenu.MAIN_SCREEN);
Group root = new Group();
root.getChildren().addAll(mainContainer);
Scene scene = new Scene(root);
primaryStage.setScene(scene);
primaryStage.setOnCloseRequest(confirmCloseEventHandler);
primaryStage.show();
}
private EventHandler<WindowEvent> confirmCloseEventHandler = event -> {
//Source: http://stackoverflow.com/questions/29710492/javafx-internal-close-request
Alert closeConfirmation = new Alert(
Alert.AlertType.CONFIRMATION,
"Are you sure you want to exit?"
);
Button exitButton = (Button) closeConfirmation.getDialogPane().lookupButton(
ButtonType.OK
);
exitButton.setText("Exit");
closeConfirmation.setHeaderText("Confirm Exit");
closeConfirmation.initModality(Modality.APPLICATION_MODAL);
closeConfirmation.initOwner(mainStage);
closeConfirmation.setX(mainStage.getX() + 150);
closeConfirmation.setY(mainStage.getY() - 300 + mainStage.getHeight());
Optional<ButtonType> closeResponse = closeConfirmation.showAndWait();
if (!ButtonType.OK.equals(closeResponse.get())) {
event.consume();
}
};
public static void main(String[] args, CoreService aService) {
// Weitergeben des CoreServices
coreService = aService;
launch(args);
}
}I do not see where the error is. When I start the program from command line it says that the MainMenu.fxml file could not been found. In my application it is in the package gui. -> gui/MainMenu.fxml
Would be nice if someone find my error!
