Cześć,
Już od piątku nad tym siedzę i nie mogę sobie poradzić, przejrzałem chyba cały internet i rozumiem w czym jest problem. Jednakże nie rozumiem czemu on wystąpił u mnie w kodzie.
Wydaje mi się, że wszystko jest pobierane prawidłowo i wartości te nie wynoszą null.
Wyskakują mi takie informacje:
Exception in Application start method
java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:464)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:363)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:1051)
Caused by: java.lang.RuntimeException: Exception in Application start method
at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:900)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:195)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: javafx.fxml.LoadException:
/D:/Project%20JAVA/mp3player/target/classes/fxml/mainPane.fxml
at javafx.fxml/javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2625)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2595)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2466)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3237)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3194)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3163)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3136)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:3113)
at javafx.fxml/javafx.fxml.FXMLLoader.load(FXMLLoader.java:3106)
at mp3player/pl.java.mp3player.main.Main.start(Main.java:18)
at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$9(LauncherImpl.java:846)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runAndWait$12(PlatformImpl.java:455)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
at java.base/java.security.AccessController.doPrivileged(Native Method)
at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run$$$capture(InvokeLaterDispatcher.java:96)
at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java)
at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
... 1 more
Caused by: java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at com.sun.javafx.reflect.Trampoline.invoke(MethodUtil.java:76)
at jdk.internal.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at javafx.base/com.sun.javafx.reflect.MethodUtil.invoke(MethodUtil.java:273)
at javafx.fxml/com.sun.javafx.fxml.MethodHelper.invoke(MethodHelper.java:83)
at javafx.fxml/javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2591)
... 18 more
Caused by: java.lang.NullPointerException
at mp3player/pl.java.mp3player.controller.MainController.createPlayer(MainController.java:38)
at mp3player/pl.java.mp3player.controller.MainController.initialize(MainController.java:31)
... 29 more
Exception running application pl.java.mp3player.main.Main
package pl.java.mp3player.controller;
import javafx.collections.ObservableList;
import javafx.fxml.FXML;
import javafx.scene.control.*;
import javafx.scene.input.MouseEvent;
import javafx.stage.FileChooser;
import javafx.stage.Stage;
import javafx.util.Duration;
import org.farng.mp3.MP3File;
import org.farng.mp3.TagException;
import pl.java.mp3player.mp3.Mp3Parser;
import pl.java.mp3player.mp3.Mp3Song;
import pl.java.mp3player.player.Mp3Player;
import java.io.File;
import java.io.IOException;
public class MainController {
@FXML
private ContentPaneController contentPaneController;
@FXML
private ControlPaneController controlPaneController;
@FXML
private MenuPaneController menuPaneController;
private Mp3Player player;
public void initialize() {
createPlayer();
configureTableClick();
configureButtons();
configureMenu();
}
private void createPlayer() {
ObservableList<Mp3Song> items = contentPaneController.getContentTable().getItems();
player = new Mp3Player(items);
}
private void configureTableClick() {
TableView<Mp3Song> contentTable = contentPaneController.getContentTable();
contentTable.addEventHandler(MouseEvent.MOUSE_CLICKED, event -> {
if (event.getClickCount() == 2) {
int selectedIndex = contentTable.getSelectionModel().getSelectedIndex();
playSelectedSong(selectedIndex);
}
});
}
private void playSelectedSong(int selectedIndex) {
player.loadSong(selectedIndex);
configureProgressBar();
configureVolume();
controlPaneController.getPlayButton().setSelected(true);
}
private void configureProgressBar() {
Slider progressSlider = controlPaneController.getProgressSlider();
//ustawienie długości suwaka postępu
player.getMediaPlayer().setOnReady(() -> progressSlider.setMax(player.getLoadedSongLength()));
//zmiana czasu w odtwarzaczu automatycznie będzie aktualizowała suwak
player.getMediaPlayer().currentTimeProperty().addListener((arg, oldVal, newVal) ->
progressSlider.setValue(newVal.toSeconds()));
//przesunięcie suwaka spowoduje przewinięcie piosenki do wskazanego miejsca
progressSlider.valueProperty().addListener((observable, oldValue, newValue) -> {
if(progressSlider.isValueChanging()) {
player.getMediaPlayer().seek(Duration.seconds(newValue.doubleValue()));
}
});
}
private void configureVolume() {
Slider volumeSlider = controlPaneController.getVolumeSlider();
volumeSlider.valueProperty().unbind();
volumeSlider.setMax(1.0);
volumeSlider.valueProperty().bindBidirectional(player.getMediaPlayer().volumeProperty());
}
private void configureButtons() {
TableView<Mp3Song> contentTable = contentPaneController.getContentTable();
ToggleButton playButton = controlPaneController.getPlayButton();
Button prevButton = controlPaneController.getPreviousButton();
Button nextButton = controlPaneController.getNextButton();
playButton.setOnAction(event -> {
if (playButton.isSelected()) {
player.play();
} else {
player.stop();
}
});
nextButton.setOnAction(event -> {
contentTable.getSelectionModel().select(contentTable.getSelectionModel().getSelectedIndex() + 1);
playSelectedSong(contentTable.getSelectionModel().getSelectedIndex());
});
prevButton.setOnAction(event -> {
contentTable.getSelectionModel().select(contentTable.getSelectionModel().getSelectedIndex() - 1);
playSelectedSong(contentTable.getSelectionModel().getSelectedIndex());
});
}
private void configureMenu(){
MenuItem openFile = menuPaneController.getFileMenuItem();
MenuItem openDirectory = menuPaneController.getDirMenuItem();
openFile.setOnAction(event -> {
FileChooser fc = new FileChooser();
fc.getExtensionFilters().add(new FileChooser.ExtensionFilter("Mp3",".mp3"));
File file = fc.showOpenDialog(new Stage());
try{
contentPaneController.getContentTable().getItems().add(Mp3Parser.createMp3Song(file));
}catch (Exception e){
e.printStackTrace();
}
});
}
}
import javafx.fxml.FXML;
import javafx.scene.control.TableColumn;
import javafx.scene.control.TableView;
import javafx.scene.control.cell.PropertyValueFactory;
import org.farng.mp3.MP3File;
import org.farng.mp3.TagException;
import pl.java.mp3player.mp3.Mp3Song;
import java.io.File;
import java.io.IOException;
public class ContentPaneController {
private static final String TITLE_COLUMN = "Tytuł";
private static final String AUTHOR_COLUMN = "Autor";
private static final String ALBUM_COLUMN = "Album";
@FXML
private TableView<Mp3Song> contentTable;
public TableView<Mp3Song> getContentTable() {
return contentTable;
}
public void initialize() {
configureTableColumns();
}
private void configureTableColumns() {
TableColumn<Mp3Song, String> titleColumn = new TableColumn<>(TITLE_COLUMN);
titleColumn.setCellValueFactory(new PropertyValueFactory<>("title"));
TableColumn<Mp3Song, String> authorColumn = new TableColumn<>(AUTHOR_COLUMN);
authorColumn.setCellValueFactory(new PropertyValueFactory<>("author"));
TableColumn<Mp3Song, String> albumColumn = new TableColumn<>(ALBUM_COLUMN);
albumColumn.setCellValueFactory(new PropertyValueFactory<>("album"));
contentTable.getColumns().add(titleColumn);
contentTable.getColumns().add(authorColumn);
contentTable.getColumns().add(albumColumn);
}
}