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  3. JavaFX Hinzufügen von Zeilen zu TableView auf einer anderen Seite

JavaFX Hinzufügen von Zeilen zu TableView auf einer anderen Seite

2017-02-22 1 views
0

Okay, ich habe einige Probleme mit diesem Programm durchgearbeitet und ich denke, ich habe es endlich soweit gebracht, dass ich verstehe, was falsch ist. Ich versuche, dieses Tutorial ein wenig zu folgen: http://docs.oracle.com/javafx/2/fxml_get_started/fxml_tutorial_intermediate.htm Aber mein Programm hat das Hinzufügen einer Zeile auf einer anderen FXML-Seite, als die Tabellenansicht eingeschaltet ist. Ich denke, das Programm hat Probleme, die beiden zu verbinden. Ich habe nach Wegen gesucht, sie dazu zu bringen, miteinander zu reden (alles in einen Controller zu stecken und es hat mir nicht gefallen, habe versucht, den Controller durch die Klasse zu schicken und das hat nicht funktioniert obwohl}). Mein Programm hat auch Integer und Doubles darin, die in diesem Tutorial nicht behandelt werden, also habe ich versucht, diese selbst herauszufinden (wahrscheinlich bessere Methoden als ich).JavaFX Hinzufügen von Zeilen zu TableView auf einer anderen Seite

Aber jetzt bin ich nur konzentrierte sich auf herauszufinden, warum es

Denken hält 
data = partTable.getItems();

ist null (Linie 77 in AddPartController). Jede Hilfe oder andere FXML/JavaFX Tutorials würden sehr geschätzt werden (obwohl ich schon viele durchgesehen habe).

FXMLDocument.fxml (Hauptseite)

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

<?import java.lang.*?> 
<?import java.util.*?> 
<?import javafx.scene.*?> 
<?import javafx.scene.control.*?> 
<?import javafx.scene.layout.*?> 
<?import javafx.scene.control.cell.*?> 
<?import javafx.collections.*?> 
<?import fxmltableview.*?> 
<?import ims.Part?> 
<?import ims.Inhouse?> 
<?import ims.Outsourced?> 

<BorderPane id="main" xmlns:fx="http://javafx.com/fxml/1" fx:controller="ims.FXMLDocumentController" > 
    <top> 
     <Label fx:id="mainTitle" text="Inventory Management System" /> 
    </top> 
    <center> 
     <HBox fx:id="holding"> 
      <children> 
       <VBox styleClass="contentBox"> 
        <children> 
         <HBox styleClass="topBox"> 
          <HBox styleClass="subHeading"> 
           <Label text="Parts" /> 
          </HBox> 
          <HBox styleClass="searchBox"> 
           <Button text="Search" /> 
           <TextField /> 
          </HBox> 
         </HBox> 
         <TableView fx:id="partTable" styleClass="dataTable"> 
          <columns> 
           <TableColumn text="Part ID"> 
            <cellValueFactory> 
             <PropertyValueFactory property="id" /> 
            </cellValueFactory> 
           </TableColumn> 
           <TableColumn fx:id="nameColumn" text="Part Name"> 
            <cellValueFactory> 
             <PropertyValueFactory property="name" /> 
            </cellValueFactory> 
           </TableColumn> 
           <TableColumn text="Inventory Level"> 
            <cellValueFactory> 
             <PropertyValueFactory property="instock" /> 
            </cellValueFactory> 
           </TableColumn> 
           <TableColumn text="Price/Cost per Unit"> 
            <cellValueFactory> 
             <PropertyValueFactory property="price" /> 
            </cellValueFactory> 
           </TableColumn> 
          </columns> 
          <items> 
           <FXCollections fx:factory="observableArrayList"> 
            <Inhouse name="Part 1" price="5.00" instock="5" max="10" min="1" /> 
            <Inhouse name="Part 2" price="7.00" instock="2" max="11" min="2" /> 
           </FXCollections> 
          </items> 
          <sortOrder> 
           <fx:reference source="nameColumn" /> 
          </sortOrder> 
         </TableView> 
         <HBox styleClass="modificationButtons"> 
          <children> 
           <Button onAction="#addPart" text="Add" /> 
           <Button onAction="#modifyPart" text="Modify" /> 
           <Button text="Delete" /> 
          </children> 
         </HBox> 
        </children> 
       </VBox> 
       <VBox styleClass="contentBox"> 
        <children> 
         <HBox styleClass="topBox"> 
          <HBox styleClass="subHeading"> 
           <Label text="Products" /> 
          </HBox> 
          <HBox styleClass="searchBox"> 
           <Button text="Search" /> 
           <TextField /> 
          </HBox> 
         </HBox> 
         <TableView fx:id="productTable" styleClass="dataTable"> 
          <columns> 
           <TableColumn text="Part ID" /> 
           <TableColumn text="Part Name" /> 
           <TableColumn text="Inventory Level" /> 
           <TableColumn text="Price/Cost per Unit" /> 
          </columns> 
         </TableView> 
         <HBox styleClass="modificationButtons"> 
          <children> 
           <Button onAction="#addProduct" text="Add" /> 
           <Button onAction="#modifyProduct" text="Modify" /> 
           <Button text="Delete" /> 
          </children> 
         </HBox> 
        </children> 
       </VBox> 
      </children> 
     </HBox> 
    </center> 
    <bottom> 
     <HBox fx:id="exitButton"> 
      <children> 
       <Button onAction="#closeProgram" text="Exit" /> 
      </children> 
     </HBox> 
    </bottom> 
</BorderPane>

FXMLDocumentController

/* 
* To change this license header, choose License Headers in Project Properties. 
* To change this template file, choose Tools | Templates 
* and open the template in the editor. 
*/ 
package ims; 

import java.io.IOException; 
import java.net.URL; 
import java.util.ResourceBundle; 
import javafx.event.ActionEvent; 
import javafx.fxml.FXML; 
import javafx.fxml.FXMLLoader; 
import javafx.fxml.Initializable; 
import javafx.scene.Node; 
import javafx.scene.Parent; 
import javafx.scene.Scene; 
import javafx.scene.control.Label; 
import javafx.stage.Stage; 

/** 
* 
* @author chelseacamper 
*/ 
public class FXMLDocumentController implements Initializable { 

    @FXML 
    private Label label; 


    @FXML 
    private void addPart(ActionEvent event) throws IOException { 
     Parent add_part_parent = FXMLLoader.load(getClass().getResource("addPart.fxml")); 
     Scene add_part_scene = new Scene(add_part_parent); 
     add_part_scene.getStylesheets().add("style.css"); 
     Stage app_stage = (Stage) ((Node) event.getSource()).getScene().getWindow(); 
     app_stage.setScene(add_part_scene); 
     app_stage.show(); 
    } 

    @FXML 
    private void modifyPart(ActionEvent event) throws IOException { 
     Parent modify_part_parent = FXMLLoader.load(getClass().getResource("modifyPart.fxml")); 
     Scene modify_part_scene = new Scene(modify_part_parent); 
     modify_part_scene.getStylesheets().add("style.css"); 
     Stage app_stage = (Stage) ((Node) event.getSource()).getScene().getWindow(); 
     app_stage.setScene(modify_part_scene); 
     app_stage.show(); 
    } 

    @FXML 
    private void addProduct(ActionEvent event) throws IOException { 
     Parent add_product_parent = FXMLLoader.load(getClass().getResource("addProduct.fxml")); 
     Scene add_product_scene = new Scene(add_product_parent); 
     add_product_scene.getStylesheets().add("style.css"); 
     Stage app_stage = (Stage) ((Node) event.getSource()).getScene().getWindow(); 
     app_stage.setScene(add_product_scene); 
     app_stage.show(); 
    } 

    @FXML 
    private void modifyProduct(ActionEvent event) throws IOException { 
     Parent modify_product_parent = FXMLLoader.load(getClass().getResource("modifyProduct.fxml")); 
     Scene modify_product_scene = new Scene(modify_product_parent); 
     modify_product_scene.getStylesheets().add("style.css"); 
     Stage app_stage = (Stage) ((Node) event.getSource()).getScene().getWindow(); 
     app_stage.setScene(modify_product_scene); 
     app_stage.show(); 
    }  

    @FXML 
    private void closeProgram(ActionEvent event) throws IOException { 
     Stage app_stage = (Stage) ((Node) event.getSource()).getScene().getWindow(); 
     app_stage.close(); 
    } 

    @Override 
    public void initialize(URL url, ResourceBundle rb) { 
     // TODO 
    }  

}

addPart.fxml

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

<?import java.lang.*?> 
<?import java.net.*?> 
<?import java.util.*?> 
<?import javafx.scene.*?> 
<?import javafx.scene.control.*?> 
<?import javafx.scene.layout.*?> 

<BorderPane id="addPage" xmlns:fx="http://javafx.com/fxml/1" fx:controller="ims.AddPartController"> 
    <fx:define> 
     <ToggleGroup fx:id="inOutGroup" /> 
    </fx:define> 
    <center> 
     <VBox fx:id="verticalHolding"> 
      <children> 
       <HBox fx:id="topRow"> 
        <Label text="Add Part"/> 
        <RadioButton fx:id="inhouse" toggleGroup="$inOutGroup" text="In-House"/> 
        <RadioButton fx:id="outsourced" toggleGroup="$inOutGroup" selected="true" text="Outsourced"/> 
       </HBox> 
       <HBox styleClass="fullWidth"> 
        <HBox styleClass="halfWidthLeft"> 
         <Label text="ID" /> 
        </HBox> 
        <HBox styleClass="halfWidthRight"> 
         <TextField promptText="Auto Gen - Disabled" /> 
        </HBox> 
       </HBox> 
       <HBox styleClass="fullWidth"> 
        <HBox styleClass="halfWidthLeft"> 
         <Label text="Name" /> 
        </HBox> 
        <HBox styleClass="halfWidthRight"> 
         <TextField fx:id="partNameField" promptText="Part Name" /> 
        </HBox> 
       </HBox> 
       <HBox styleClass="fullWidth"> 
        <HBox styleClass="halfWidthLeft"> 
         <Label text="Inv" /> 
        </HBox> 
        <HBox styleClass="halfWidthRight"> 
         <TextField fx:id="partInstockField" promptText="Inv" /> 
        </HBox> 
       </HBox> 
       <HBox styleClass="fullWidth"> 
        <HBox styleClass="halfWidthLeft"> 
         <Label text="Price/Cost" /> 
        </HBox> 
        <HBox styleClass="halfWidthRight"> 
         <TextField fx:id="partPriceField" promptText="Price/Cost" /> 
        </HBox> 
       </HBox> 
       <HBox styleClass="fullWidth"> 
        <HBox styleClass="halfWidthLeft"> 
         <Label text="Max" /> 
        </HBox> 
        <HBox styleClass="halfWidthRight"> 
         <TextField styleClass="smallTextField" fx:id="partMaxField" promptText="Max" /> 
         <Label text="Min" /> 
         <TextField styleClass="smallTextField" fx:id="partMinField" promptText="Min" /> 
        </HBox> 
       </HBox> 
       <HBox styleClass="fullWidth"> 
        <HBox styleClass="halfWidthLeft"> 
         <Label fx:id="inhouseLabel" text="Machine ID" /> 
         <Label fx:id="outsourcedLabel" text="Company Name" /> 
        </HBox> 
        <HBox styleClass="halfWidthRight"> 
         <TextField fx:id="inhouseTextField" promptText="Mach ID" /> 
         <TextField fx:id="outsourcedTextField" promptText="Comp Nm" /> 
        </HBox> 
       </HBox> 
       <HBox styleClass="fullWidth"> 
        <HBox styleClass="halfWidthLeft"> 
        </HBox> 
        <HBox styleClass="halfWidthRight"> 
         <Button onAction="#addInhouse" text="Save" /> 
         <Button onAction="#backToMain" text="Cancel" /> 
        </HBox> 
       </HBox> 
      </children> 
     </VBox> 
    </center> 
</BorderPane>

AddPartController

/* 
* To change this license header, choose License Headers in Project Properties. 
* To change this template file, choose Tools | Templates 
* and open the template in the editor. 
*/ 
package ims; 

import java.io.IOException; 
import java.net.URL; 
import java.util.ResourceBundle; 
import javafx.collections.ObservableList; 
import javafx.event.ActionEvent; 
import javafx.fxml.FXML; 
import javafx.fxml.FXMLLoader; 
import javafx.fxml.Initializable; 
import javafx.scene.Node; 
import javafx.scene.Parent; 
import javafx.scene.Scene; 
import javafx.scene.control.Label; 
import javafx.scene.control.TableView; 
import javafx.scene.control.TextField; 
import javafx.scene.control.ToggleButton; 
import javafx.stage.Stage; 

/** 
* FXML Controller class 
* 
* @author chelseacamper 
*/ 
public class AddPartController implements Initializable { 
    @FXML 
    ToggleButton inhouse; 
    @FXML 
    ToggleButton outsourced; 
    @FXML 
    Label inhouseLabel; 
    @FXML 
    Label outsourcedLabel; 
    @FXML 
    TextField inhouseTextField; 
    @FXML 
    TextField outsourcedTextField; 
    @FXML 
    private TableView<Inhouse> partTable; 
    @FXML 
    private TextField partNameField; 
    @FXML 
    private TextField partInstockField; 
    @FXML 
    private TextField partPriceField; 
    @FXML 
    private TextField partMaxField; 
    @FXML 
    private TextField partMinField; 

    /** 
    * Initializes the controller class. 
    * @param url 
    * @param rb 
    */ 
    @Override 
    public void initialize(URL url, ResourceBundle rb) { 
     inhouseLabel.visibleProperty().bind(inhouse.selectedProperty()); 
     outsourcedLabel.visibleProperty().bind(outsourced.selectedProperty()); 
     inhouseTextField.visibleProperty().bind(inhouse.selectedProperty()); 
     outsourcedTextField.visibleProperty().bind(outsourced.selectedProperty()); 
     inhouseLabel.managedProperty().bind(inhouse.selectedProperty()); 
     outsourcedLabel.managedProperty().bind(outsourced.selectedProperty()); 
     inhouseTextField.managedProperty().bind(inhouse.selectedProperty()); 
     outsourcedTextField.managedProperty().bind(outsourced.selectedProperty()); 

    } 

    @FXML 
    public void addInhouse(ActionEvent event){ 
     ObservableList<Inhouse> data; 
     data = partTable.getItems(); 
     data.add(new Inhouse(partNameField.getText(), 
       Integer.parseInt(partInstockField.getText()), 
       Double.parseDouble(partPriceField.getText()), 
       Integer.parseInt(partMaxField.getText()), 
       Integer.parseInt(partMinField.getText()), 
       Integer.parseInt(inhouseTextField.getText()) 
//    Integer.parseInt(outsourcedTextField.getText()) 
       )); 
     partNameField.setText(""); 
     partInstockField.setText(String.valueOf(partInstockField)); 
     partPriceField.setText(String.valueOf(partPriceField)); 
     partMaxField.setText(String.valueOf(partMaxField)); 
     partMinField.setText(String.valueOf(partMinField)); 
     inhouseTextField.setText(String.valueOf(inhouseTextField)); 
//  outsourcedTextField.setText(String.valueOf(outsourcedTextField)); 
    } 

    @FXML 
    private void backToMain(ActionEvent event) throws IOException { 
     Parent add_main_parent = FXMLLoader.load(getClass().getResource("FXMLDocument.fxml")); 
     Scene add_main_scene = new Scene(add_main_parent); 
     add_main_scene.getStylesheets().add("style.css"); 
     Stage app_stage = (Stage) ((Node) event.getSource()).getScene().getWindow(); 
     app_stage.setScene(add_main_scene); 
     app_stage.show(); 
    } 

}

Fehler, die Sie, wenn Sie auf Hinzufügen klicken und dann speichern (müssen nicht einmal Sachen eingeben)

Exception in thread "JavaFX Application Thread" java.lang.RuntimeException: java.lang.reflect.InvocationTargetException 
    at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1770) 
    at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1653) 
    at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86) 
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238) 
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191) 
    at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59) 
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58) 
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) 
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) 
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) 
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) 
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) 
    at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74) 
    at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49) 
    at javafx.event.Event.fireEvent(Event.java:198) 
    at javafx.scene.Node.fireEvent(Node.java:8390) 
    at javafx.scene.control.Button.fire(Button.java:185) 
    at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182) 
    at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96) 
    at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89) 
    at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218) 
    at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80) 
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238) 
    at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191) 
    at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59) 
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58) 
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) 
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) 
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) 
    at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56) 
    at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114) 
    at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74) 
    at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54) 
    at javafx.event.Event.fireEvent(Event.java:198) 
    at javafx.scene.Scene$MouseHandler.process(Scene.java:3758) 
    at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3486) 
    at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762) 
    at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2495) 
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:350) 
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:275) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$350(GlassViewEventHandler.java:385) 
    at com.sun.javafx.tk.quantum.GlassViewEventHandler$$Lambda$294/109927940.get(Unknown Source) 
    at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:404) 
    at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:384) 
    at com.sun.glass.ui.View.handleMouseEvent(View.java:555) 
    at com.sun.glass.ui.View.notifyMouse(View.java:927) 
Caused by: java.lang.reflect.InvocationTargetException 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:497) 
    at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71) 
    at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:497) 
    at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275) 
    at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1765) 
    ... 46 more 
Caused by: java.lang.NullPointerException 
    at ims.AddPartController.addInhouse(AddPartController.java:77) 
    ... 56 more

Quelle

2017-02-22 Chelsea

Antwort

1

Die in addPart.fxml mit fx:id="partTable" kein Element ist. Folglich ist partTable null und

partTable.getItems();

löst eine Nullzeigerausnahme aus.

Sie müssen partTable in die Steuerung für die FXML injizieren, in der sie definiert ist:

public class FXMLDocumentController implements Initializable { 

    @FXML 
    private Label label; 

    @FXML 
    private TableView<Inhouse> partTable ; 

    // ... 
}

Der AddPartController braucht nur den Zugriff auf die Liste der Elemente der Tabelle zugeordnet, so dass Sie für ein Feld definieren es, und ein Verfahren zur Initialisierung es:

public class AddPartController implements Initializable { 

    // ... 

    private ObservableList<Inhouse> tableItems ; 

    public void setTableItems(ObservableList<Inhouse> tableItems) { 
     this.tableItems = tableItems ; 
    } 

    // ... 
}

setzen dann die verschiedenen Elemente, wenn Sie addPart.fxml laden:

@FXML 
private void addPart(ActionEvent event) throws IOException { 

    FXMLLoader loader = new FXMLLoader(getClass().getResource("addPart.fxml")); 
    Parent add_part_parent = loader.load(); 

    AddPartController addPartController = loader.getController(); 
    addPartController.setTableItems(partTable.getItems()); 

    Scene add_part_scene = new Scene(add_part_parent); 
    add_part_scene.getStylesheets().add("style.css"); 
    Stage app_stage = (Stage) ((Node) event.getSource()).getScene().getWindow(); 
    app_stage.setScene(add_part_scene); 
    app_stage.show(); 
}

und dann natürlich brauchen Sie nur

@FXML 
public void addInhouse(ActionEvent event){ 

    tableItems.add(new Inhouse(partNameField.getText(), 
      Integer.parseInt(partInstockField.getText()), 
      Double.parseDouble(partPriceField.getText()), 
      Integer.parseInt(partMaxField.getText()), 
      Integer.parseInt(partMinField.getText()), 
      Integer.parseInt(inhouseTextField.getText()) 
      // Integer.parseInt(outsourcedTextField.getText()) 
      )); 
}

(FWIW ich keine Ahnung, was

partInstockField.setText(String.valueOf(partInstockField));

etc etc tun soll.)

Quelle

2017-02-22 00:44:06

+0

Vielen Dank für Ihre schnelle Antwort und Erklärungen! Ich schätze es.Ich bekomme "kann nicht finden Symbol Variable Loader" für diese beiden Zeilen: 'Parent add_part_parent = loader.load(); AddPartController addPartController = loader.getController(); 'Netbeans empfiehlt, dass ich ein Feld namens" loader "gemacht habe, was ich nicht für richtig halte, aber wenn ich es tue, kommt es wieder mit einem Fehler von" kann nicht finden symbol method load() ". Irgendwelche Ideen? – Chelsea

+0

@Chelsea Wenn Sie sich den Code ansehen, den ich sorgfältig geschrieben habe, werden Sie sehen, dass in der Zeile unmittelbar vor 'Parent add_part_parent = loader.load(); ', ich eine Variable namens' loader' definiere. –

+0

Du hast Recht, das ist 100% mein Schlechter. Vielen Dank! Ich versuche jetzt herauszufinden, wie man die Tabelle aktualisieren kann, wenn man etwas hinzufügt, aber zumindest gibt es mir diesen Fehler nicht mehr. (: – Chelsea

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