在TableView中

Question

沒有的內容我想從數據庫到我tableview.I've加載一些數據得到了一個代碼，它工作正常，但沒有我的tableview是空的.... 這裏是我的FXML文件：

<TableView fx:id="libraryNode" editable="true" onKeyPressed="#onLibraryRequest" xmlns:fx="http://javafx.com/fxml" fx:controller="mediabox.app.controller.MusicscreenController"> 
<columns> 
    <TableColumn text="Index" prefWidth="40" > 
     <cellValueFactory> 
      <PropertyValueFactory property="id" /> 
     </cellValueFactory> 
    </TableColumn> 
    <TableColumn text="Titel" prefWidth="150"> 
     <cellValueFactory> 
      <PropertyValueFactory property="titel" /> 
     </cellValueFactory> 
    </TableColumn> 
    <TableColumn text="Dauer" prefWidth="150" > 
     <cellValueFactory> 
      <PropertyValueFactory property="playtime" /> 
     </cellValueFactory> 
    </TableColumn> 
    <TableColumn text="Interpret" prefWidth="150"> 
     <cellValueFactory> 
      <PropertyValueFactory property="interpret" /> 
     </cellValueFactory> 
    </TableColumn> 
    <TableColumn text="Album" prefWidth="150"> 
     <cellValueFactory> 
      <PropertyValueFactory property="album" /> 
     </cellValueFactory> 
    </TableColumn> 
    <TableColumn text="Genre" prefWidth="150" > 
     <cellValueFactory> 
      <PropertyValueFactory property="genre" /> 
     </cellValueFactory> 
    </TableColumn> 
    <TableColumn text="Bewertung" prefWidth="60"> 
     <cellValueFactory> 
      <PropertyValueFactory property="score" /> 
     </cellValueFactory> 
    </TableColumn> 
</columns> 

這是我的超類全部Mediatypes：

public abstract class Medium { 

private static int id; 
private String filepath; 
private final Media mediaResource; 
private final SimpleStringProperty titel = new SimpleStringProperty(); 
private final SimpleStringProperty genre = new SimpleStringProperty(); 
private final SimpleDoubleProperty score = new SimpleDoubleProperty(); 

protected Medium(String filepath, String titel, String genre, double score) { 
    setId(id++); 
    setFilepath(filepath); 
    setTitel(titel); 
    setGenre(genre); 
    setScore(score); 
    this.mediaResource = new Media(new File(getFilepath()).toURI().toString()); 
} 

public static int getId() { 
    return id; 
} 

public static void setId(int id) { 
    Medium.id = id; 
} 

public final StringProperty titelProperty() { 
    return this.titel; 
} 

public String getTitel() { 
    return titelProperty().get(); 
} 

public final void setTitel(String titel) { 
    titelProperty().set(titel); 
} 

public final StringProperty genreProperty() { 
    return this.genre; 
} 

public String getGenre() { 
    return genreProperty().get(); 
} 

public final void setGenre(String genre) { 
    genreProperty().set(genre); 
} 

public final DoubleProperty scoreProperty() { 
    return this.score; 
} 

public double getScore() { 
    return scoreProperty().get(); 
} 

public final void setScore(double score) { 
    scoreProperty().set(score); 
} 

public final String getFilepath() { 
    return this.filepath; 
} 

public final void setFilepath(String filepath) { 
    this.filepath = filepath; 
} 

public Media getMediaResource() { 
    return mediaResource; 
} 

}

這是音樂類：

public final class Music extends Medium { 

private final SimpleStringProperty playtime = new SimpleStringProperty(); 
private final SimpleStringProperty interpret = new SimpleStringProperty(); 
private final SimpleStringProperty album = new SimpleStringProperty(); 
private final SimpleStringProperty genre = new SimpleStringProperty(); 
private final SimpleDoubleProperty score = new SimpleDoubleProperty(); 

/** 
* 
* @param titel 
* @param playtime 
* @param interpret 
* @param album 
* @param genre 
* @param score 
* @param filepath 
*/ 
public Music(String titel,String playtime, String interpret, 
       String album, String genre, double score, String filepath) { 
    super(filepath, titel,genre, score); 
    setPlaytime(playtime); 
    setInterpret(interpret); 
    setAlbum(album); 

} 

public final StringProperty playtimeProperty() { 
    return this.playtime; 
} 
public String getPlaytime() { 
    return playtimeProperty().get(); 
} 

public void setPlaytime(String playtime) { 
    playtimeProperty().set(playtime); 
} 

public final StringProperty interpretProperty() { 
    return this.interpret; 
} 

public String getInterpret() { 
    return interpretProperty().get(); 
} 

public void setInterpret(String interpret) { 
    interpretProperty().set(interpret); 
} 

public final StringProperty albumProperty() { 
    return this.album; 
} 

public String getAlbum() { 
    return albumProperty().get(); 
} 

public void setAlbum(String album) { 
    albumProperty().set(album); 
} 

}

這是從數據庫加載數據到的tableview控制器：

public final class MusicscreenController extends Controller implements Initializable { 

@FXML 
public TableView libraryNode; 

@FXML 
private MediaView mediaPlayerView; 


/** 
* Initialisiert die Bibliothek 
*/ 
@Override 
protected void initLibrary() { 
    try { 
     DatabaseConnector.connectTo("src/mediabox/database/database"); 
     boolean setAll = libraryNode.getItems().addAll(DatabaseConnector.loadEntries("Music")); // Einträge der Datenbank 

     // auslesen und der library Node hinzufügen 
    } catch (SQLException | ConnectionException | NamingException | ClassNotFoundException ex) { 
     Logger.getLogger(MusicscreenController.class.getName()).log(Level.SEVERE, null, ex); 
    } 
} 

@Override 
public void initialize(URL url, ResourceBundle rb) { 
    libraryNode = new TableView<Music>(); 
    initLibrary(); 
    libraryNode.requestFocus(); 
    libraryNode.getSelectionModel().selectFirst(); 
} 

@FXML 
public void onLibraryRequest(KeyEvent e) { 
    if (e.getCode().equals(KeyCode.ENTER)) { 
     try { 
      MediaPlayerController mediaPlayerController = new MediaPlayerController((Music) libraryNode.getSelectionModel().getSelectedItem()); 
     } catch (IOException ex) { 
      Logger.getLogger(MusicscreenController.class.getName()).log(Level.SEVERE, null, ex); 
     } 

    } 
} 

}

沒有錯誤消息或類似的東西。 TableView只顯示「TableView中沒有內容」 DatabaseConnector類正常工作。我測試瞭如果加載的ArrayList包含正確的數據。我在這段代碼中找不到錯誤... AarrayList包含所有音樂對象，但表格不代表它們。所以我認爲我在設計tableview時遇到了問題。

-GhostfaceChilla-

Answer 1

內，您的初始化方法，你不應該使用

libraryNode = new TableView<Music>(); 

所有組件控制器打上@FXML而FXML加載