JavaFX切换BorderPane的中心：按钮只能工作一次

我对JavaFX在一分钟内感到困惑。基本上，当我运行我的代码时，我只能单击应用程序侧栏上的按钮一次，然后它将交换中心窗格以显示我想要显示的窗格。然后，虽然，它似乎ActionEvent不会触发...我已经尝试重新附加它们处理后，但它不起作用，我不知道什么是错的。JavaFX切换BorderPane的中心：按钮只能工作一次

我已经花了2天试图解决这个问题，而且我确定它是如此令人讨厌的简单。

控制器：

@FXML private Button fooButton, barButton; 
@FXML private Pane fooPane, barPane; 
@FXML private BorderPane mainWindow; 
@FXML private TabPane tabPane; 
@FXML private VBox buttonBar; 
@FXML private AnchorPane centerAP; 
private HashMap<Button, Pane> buttonsPaneHMap = new HashMap<>(); //storing the data in a HashMap to create a link between buttons and their panes. 

@Override 
public void initialize(URL arg0, ResourceBundle arg1) { 
    putNodesInHashmap(); 
    assertControlsExist(); 
    mainWindow.setCenter(welcomePane); 
    setOnActions(buttonsPaneHMap); 
} 

public final void handleButton(ActionEvent event) throws IOException { 
    Node newCenter = new AnchorPane(); 

    if (event.getSource() == fooButton){ 
     newCenter = FXMLLoader.load(getClass().getResource("/FXML/fooPane.fxml")); 
    } 
    if (event.getSource() == barButton){ 
     newCenter = FXMLLoader.load(getClass().getResource("/FXML/barPane.fxml")); 
    }    

    try{ 
     this.mainWindow.setCenter(newCenter); 
    } 
    catch (NullPointerException e){ 
     e.printStackTrace(); 
    } 
} 

public final void setOnActions(HashMap<Button, Pane> hMap){ 
    for (Button button : hMap.keySet()){ 
     ((ButtonBase) button).setOnAction(arg0 -> { 
      try { 
       handleButton(arg0); 
      } 
      catch (Exception e) { 
       e.printStackTrace(); 
      } 
     }); 
    }  
} 
public final void putNodesInHashMap(){ 
    buttonsPaneHMap.put(fooButton, fooPane); 
    buttonsPaneHMap.put(barButton, barPane); 

}

FXML

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

<?import java.net.URL?> 
<?import javafx.scene.Cursor?> 
<?import javafx.scene.control.Button?> 
<?import javafx.scene.control.Label?> 
<?import javafx.scene.control.Tab?> 
<?import javafx.scene.control.TabPane?> 
<?import javafx.scene.control.TextField?> 
<?import javafx.scene.image.Image?> 
<?import javafx.scene.image.ImageView?> 
<?import javafx.scene.layout.AnchorPane?> 
<?import javafx.scene.layout.BorderPane?> 
<?import javafx.scene.layout.Pane?> 
<?import javafx.scene.layout.VBox?> 
<?import javafx.scene.text.Font?> 

<BorderPane fx:id="mainWindow" prefHeight="461.0" prefWidth="760.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="guiControllers.MainController"> 
    <top> 
     <Pane id="body" prefHeight="96.0" prefWidth="658.0" style="-fx-background-color: #243242; -fx-border-color: #0E141B; -fx-border-radius: 3;" stylesheets="@application.css" BorderPane.alignment="CENTER"> 
     <children> 
      <Label layoutX="103.0" layoutY="25.0" prefHeight="48.0" prefWidth="394.0" text="Title Here" textFill="WHITE"> 
       <font> 
        <Font name="Calibri Bold" size="41.0" /> 
       </font> 
      </Label> 
      <ImageView fitHeight="55.0" fitWidth="61.0" layoutX="25.0" layoutY="20.0" pickOnBounds="true" preserveRatio="true"> 
       <image> 
        <Image url="@../Res/mhlogo.png" /> 
       </image> 
      </ImageView> 
     </children> 
     </Pane> 
    </top> 
    <left> 
     <VBox id="buttonBar" fx:id="buttonBar" alignment="TOP_CENTER" prefHeight="365.0" prefWidth="168.0" style="-fx-background-color: #2E4055; -fx-border-radius: 3; -fx-border-color: #0E141B;" BorderPane.alignment="CENTER"> 
     <children> 
      <Pane prefHeight="31.0" prefWidth="98.0"> 
       <children> 
        <Pane layoutX="-1.0" layoutY="-2.0" prefHeight="33.0" prefWidth="169.0" style="-fx-background-color: #565656; -fx-border-color: #000000; -fx-border-radius: 20; -fx-background-radius: 20;"> 
        <children> 
         <ImageView fitHeight="19.0" fitWidth="18.0" layoutX="7.0" layoutY="7.0" pickOnBounds="true" preserveRatio="true"> 
          <image> 
           <Image url="@../Res/magnifying-glass.png" /> 
          </image> 
         </ImageView> 
         <TextField layoutX="29.0" layoutY="2.0" prefHeight="0.0" prefWidth="134.0" style="-fx-border-radius: 1; -fx-border-color: #111111; -fx-border-width: 2; -fx-background-color: #FFFFFF; -fx-background-radius: 20; -fx-border-radius: 20;" styleClass="stop-color-leaking" stylesheets="@../cSS/application.css" /> 
        </children> 
        </Pane> 
       </children> 
      </Pane> 
      <Button id="fooButton" fx:id="fooButton" mnemonicParsing="false" onAction="#handleButton" prefHeight="31.0" prefWidth="171.0" style="-fx-background-color: #CDCDCD; -fx-border-color: #0E141B; -fx-border-radius: 3;" text="foo" /> 
      <Button id="barButton" fx:id="barButton" mnemonicParsing="false" onAction="#handleButton" prefHeight="31.0" prefWidth="202.0" style="-fx-background-color: #CDCDCD; -fx-border-color: #0E141B; -fx-border-radius: 3;" text="bar" /> 

       <children> 
        <ImageView id="settingsButton" fitHeight="38.0" fitWidth="48.0" layoutX="64.0" layoutY="130.0" pickOnBounds="true" preserveRatio="true"> 
        <image> 
         <Image url="@../Res/settings.png" /> 
        </image> 
        </ImageView> 
       </children> 
      </AnchorPane> 
     </children> 
     </VBox> 
    </left> 
    <right> 
     <TabPane id="tabPane" fx:id="tabPane" focusTraversable="false" prefHeight="365.0" prefWidth="166.0" rotateGraphic="true" style="-fx-background-color: # #414760;" styleClass="tab-header-background" tabClosingPolicy="UNAVAILABLE" BorderPane.alignment="CENTER"> 
     <tabs> 
      <Tab fx:id="notesTab" text="Notes"> 
      <content> 
       <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="336.0" prefWidth="216.0" style="-fx-border-color: #414760; -fx-background-radius: 3;" styleClass="tab-header-background" stylesheets="@../application/CSS/application.css" /> 
      </content> 
      </Tab> 
      <Tab fx:id="diagramTab" closable="false" text="Diagram" /> 
     </tabs> 
     <cursor> 
      <Cursor fx:constant="DEFAULT" /> 
     </cursor> 
     <stylesheets> 
      <URL value="@application.css" /> 
      <URL value="@../application/CSS/application.css" /> 
     </stylesheets> 
     </TabPane> 
    </right> 
    <center> 
     <AnchorPane fx:id="centerAP" style="-fx-background-color: #414760;" BorderPane.alignment="CENTER"> 
     <children> 
      <VBox fx:id="welcomePane" prefHeight="304.0" prefWidth="391.0" style="-fx-background-color: #414760;"> 
       <children> 
        <Pane fx:id="welcomePane" prefHeight="313.0" prefWidth="428.0" style="-fx-background-color: #414760;"> 
        <children> 
         <ImageView fitHeight="183.0" fitWidth="296.0" layoutX="14.0" layoutY="65.0" pickOnBounds="true" preserveRatio="true"> 
          <image> 
           <Image url="@../Res/welcomepane.png" /> 
          </image> 
         </ImageView> 
         <Label layoutX="141.0" layoutY="14.0" text="Welcome" textFill="WHITE"> 
          <font> 
           <Font name="Calibri Bold" size="33.0" /> 
          </font> 
         </Label> 
         <Label layoutX="82.0" layoutY="53.0" prefHeight="68.0" prefWidth="346.0" text="To start, please select an" textFill="WHITE" textOverrun="CLIP"> 
          <font> 
           <Font name="Calibri" size="24.0" /> 
          </font> 
         </Label> 
         <Label layoutX="82.0" layoutY="80.0" prefHeight="68.0" prefWidth="346.0" text="option from the left." textFill="WHITE" textOverrun="CLIP"> 
          <font> 
           <Font name="Calibri" size="24.0" /> 
          </font> 
         </Label> 
        </children> 
        </Pane> 
       </children> 
      </VBox> 
     </children> 
     </AnchorPane> 
    </center> 
</BorderPane>

据我可以告诉所有对象都从FXML正确地注入，但是一旦中央面板已切换，侧键不再功能（尽管我可以点击任何最初的代码并且它会加载。

脚注：上面的代码被略微减少并且为了可读性而更改。

来源

2017-04-13 Ben Hayward

在没有看到'fxml'该控制器（我假设我们正在寻找一个控制器的一部分），这有点难以分辨。是否有这样一个奇怪的方式分配行动处理程序的原因？习惯上每个按钮的动作处理程序都有一个单独的方法，它可以在'initialize（）'方法中指定，或者通过'fxml'映射。 – Cypher

我不知道为什么这首先起作用，因为你似乎从未填充过地图...... – fabian

看来你试图设置按钮上的处理程序，而这些按钮并不是官方的控制器。我有类似的情况，我可以发布给你一个关于我如何处理它的想法。 – Sedrick

我从Android的剧本中获得了一个想法。如果您知道如何到达节点的父节点，并且您知道该节点的fx：id，则可以使用此方法。

完整的代码根据按下哪个按钮将不同的窗格加载到场景的中心。下面的代码是一个示例，显示如何加载一个窗格。如果您知道节点的父节点，节点的fx：id和用于投射的节点类型，则可以使用此方法获取任何节点。

控制器代码

private void showSetupAccountScreen() 
{ 
    try 
    { 
     spCenterDisplay.getChildren().remove(0);//remove old display    
     BorderPane root = FXMLLoader.load(getClass().getResource("SubSetupAccount.fxml")); 
     spCenterDisplay.getChildren().add(root);//add new display 
     GridPane tempDisplay = (GridPane)root.getChildren().get(1);//get Parent of the nodes I will be using in this controller 
     loadQWERTYKeyboard();    

     TextField tfFirstName = (TextField)findNodeByID("tfFirstName", tempDisplay.getChildren()); 
     TextField tfLastName = (TextField)findNodeByID("tfLastName", tempDisplay.getChildren()); 
     TextField tfStreetAddress = (TextField)findNodeByID("tfStreetAddress", tempDisplay.getChildren()); 
     TextField tfCity = (TextField)findNodeByID("tfCity", tempDisplay.getChildren()); 
     TextField tfState = (TextField)findNodeByID("tfState", tempDisplay.getChildren()); 
     TextField tfZip = (TextField)findNodeByID("tfZip", tempDisplay.getChildren()); 
     TextField tfInitialDepositChecking = (TextField)findNodeByID("tfInitialDepositChecking", tempDisplay.getChildren()); 
     TextField tfInitialDepositSavings = (TextField)findNodeByID("tfInitialDepositSavings", tempDisplay.getChildren()); 
     ChoiceBox cbChecking = (ChoiceBox)findNodeByID("cbChecking", tempDisplay.getChildren()); 
     cbChecking.getItems().addAll("No", "Yes"); 
     cbChecking.setValue("No"); 
     ChoiceBox cbSavings = (ChoiceBox)findNodeByID("cbSavings", tempDisplay.getChildren()); 
     cbSavings.getItems().addAll("No", "Yes"); 
     cbSavings.setValue("No");    

     if(true)//come back and check to make sure all info is in textfields 
     { 
      btnLeftOne.setOnAction((event) -> { 

       boolean createChecking = cbChecking.getValue().equals("Yes"); 
       boolean createSavings = cbSavings.getValue().equals("Yes"); 

       dbh.createNewAccount(tfFirstName.getText(), tfLastName.getText(), tfStreetAddress.getText(), tfCity.getText(), 
            tfState.getText(), tfZip.getText(), createChecking, Double.parseDouble(tfInitialDepositChecking.getText()), 
            createSavings, Double.parseDouble(tfInitialDepositSavings.getText())); 
      }); 
     } 
     else 
     { 
      //create Alert 
     } 

     btnRightOne.setOnAction((event) -> { 
      cancelAccountCreation(); 
     }); 

     btnLeftTwo.setOnAction(null); 
     btnLeftThree.setOnAction(null); 
     btnLeftFour.setOnAction(null); 
     btnRightTwo.setOnAction(null); 
     btnRightThree.setOnAction(null); 
     btnRightFour.setOnAction(null); 
    } 
    catch (IOException ex) 
    { 
     Logger.getLogger(FXMLDocumentController.class.getName()).log(Level.SEVERE, null, ex); 
    } 
} 

private void loadQWERTYKeyboard() 
{ 
    try 
    { 
     AnchorPane keyboardRoot = FXMLLoader.load(getClass().getResource("KeyboardQWERTY.fxml")); 
     System.out.println(keyboardRoot.getId()); 
     spBottomDisplay.getChildren().add(keyboardRoot); 

     GridPane tempKeyboard = (GridPane)keyboardRoot.getChildren().get(0); 

     tempKeyboard.getChildren().stream().filter((tempNode) 
       -> (tempNode instanceof Button)).map((
         tempNode) -> (Button) tempNode).forEachOrdered((tempButton) -> { 
          buttons.put(tempButton.getText().toLowerCase(), tempButton); 
         }); 

     apMain.setOnKeyPressed((event) -> { 
      Button tempButton = buttons.get(event.getText()); 
      if (tempButton != null) { 
       tempButton.arm(); 
       tempButton.setStyle("-fx-background-color: blue"); 
      } 
      else if (event.getCode().equals(KeyCode.ENTER)) { 
       tempButton = buttons.get("enter"); 
       tempButton.arm(); 
       tempButton.setStyle("-fx-background-color: blue"); 
      } 
      else if (event.getCode().equals(KeyCode.BACK_SPACE)) { 
       tempButton = buttons.get("backspace"); 
       tempButton.arm(); 
       tempButton.setStyle("-fx-background-color: blue"); 
      } 
      else if (event.getCode().equals(KeyCode.SPACE)) { 
       tempButton = buttons.get("space"); 
       tempButton.arm(); 
       tempButton.setStyle("-fx-background-color: blue"); 
      } 
     }); 

     apMain.setOnKeyReleased((event) -> { 
      System.out.println(); 
      Button tempButton = buttons.get(event.getText()); 
      System.out.println("Released key text: " + event.getText()); 
      System.out.println("Released key code: " + event.getCode()); 

      if (tempButton != null) { 
       tempButton.disarm(); 
       tempButton.setStyle(""); 
      } 
      else if (event.getCode().equals(KeyCode.ENTER)) { 
       tempButton = buttons.get("enter"); 
       tempButton.disarm(); 
       tempButton.setStyle(""); 
      } 
      else if (event.getCode().equals(KeyCode.BACK_SPACE)) { 
       tempButton = buttons.get("backspace"); 
       tempButton.disarm(); 
       tempButton.setStyle(""); 
      } 
      else if (event.getCode().equals(KeyCode.SPACE)) { 
       tempButton = buttons.get("space"); 
       tempButton.disarm(); 
       tempButton.setStyle(""); 
      } 
     }); 
    } 
    catch (IOException ex) 
    { 
     Logger.getLogger(FXMLDocumentController.class.getName()).log(Level.SEVERE, null, ex); 
    } 
} 

private Node findNodeByID(String id, ObservableList<Node> observableList) 
{ 
    for(Node node : observableList) 
    { 
     if(node.getId().equals(id)) 
     { 
      System.out.println("node found!"); 
      return node; 
     } 
     else 
     { 
      System.out.println("node not found yet!"); 
     } 
    } 

    return null; 
}

在该片断的代码我使用两种不同的方法。在loadQWERTYKeyboard方法中是一种方法。在findNodeByID中是第二种方法。完整的代码被发现here。工作但项目不完整。

来源

2017-04-13 19:19:37 Sedrick

此答案类似于您发布的代码。这个答案使用了原始答案中提到的两个相同的想法。

主要

import javafx.application.Application; 
import javafx.fxml.FXMLLoader; 
import javafx.scene.Parent; 
import javafx.scene.Scene; 
import javafx.stage.Stage; 

/** 
* 
* @author blj0011 
*/ 
public class JavaFXApplication75 extends Application 
{ 

    @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(); 
    } 

    /** 
    * @param args the command line arguments 
    */ 
    public static void main(String[] args) 
    { 
     launch(args); 
    } 

}

FXML

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

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

<AnchorPane id="AnchorPane" prefHeight="449.0" prefWidth="564.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1" fx:controller="javafxapplication75.FXMLDocumentController"> 
    <children> 
     <Button fx:id="btnMainBar" layoutX="76.0" layoutY="391.0" onAction="#handleButtonAction" text="Load Bar" /> 
     <Label fx:id="label" layoutX="126" layoutY="120" minHeight="16" minWidth="69" /> 
     <Button fx:id="btnMainFoo" layoutX="419.0" layoutY="391.0" mnemonicParsing="false" onAction="#handleButtonAction" text="Load Foo" /> 
     <AnchorPane fx:id="apMain" layoutX="161.0" layoutY="88.0" prefHeight="200.0" prefWidth="200.0" AnchorPane.bottomAnchor="100.0" AnchorPane.leftAnchor="50.0" AnchorPane.rightAnchor="50.0" AnchorPane.topAnchor="25.0" /> 
    </children> 
</AnchorPane>

控制器

import java.io.IOException; 
import java.net.URL; 
import java.util.ResourceBundle; 
import java.util.logging.Level; 
import java.util.logging.Logger; 
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.control.Button; 
import javafx.scene.control.Label; 
import javafx.scene.control.TextField; 
import javafx.scene.layout.AnchorPane; 
import javafx.scene.layout.Pane; 

/** 
* 
* @author blj0011 
*/ 
public class FXMLDocumentController implements Initializable 
{  
    @FXML AnchorPane apMain;//This pane will be used to display the other two panes depending on which button is pressed. 

    //Foo Pane children nodes 
    Button btnFooOne, btnFooTwo; 
    TextField tfFooOne, tfFooTwo; 
    Label lblFoo; 

    //Bar Pane children nodes 
    Button btnBar; 
    TextField tfBar; 
    Label lblBar; 

    @FXML 
    private void handleButtonAction(ActionEvent event) 
    { 
     if(((Button)event.getSource()).getId().equals("btnMainBar")) 
     { 
      loadBarPane(); 
     } 
     else if(((Button)event.getSource()).getId().equals("btnMainFoo")) 
     { 
      loadFooPane(); 
     } 
    } 

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

    //This approach uses the findNodeByID method. 
    private void loadFooPane() 
    { 
     try 
     { 
      if(apMain.getChildren().size() > 0) 
      { 
       apMain.getChildren().remove(0);//if a node is loaded into apMain, remove the node. 
      } 

      Pane root = FXMLLoader.load(getClass().getResource("Foo.fxml")); 
      apMain.getChildren().add(root);//Add Foo Pane to apMain 

      //Get Foo Pane's children nodes 
      tfFooOne = (TextField)findNodeByID("tfFooOne", root.getChildren()); 
      tfFooTwo = (TextField)findNodeByID("tfFooTwo", root.getChildren()); 
      btnFooOne = (Button)findNodeByID("btnFooOne", root.getChildren()); 
      btnFooTwo = (Button)findNodeByID("btnFooTwo", root.getChildren()); 
      lblFoo = (Label)findNodeByID("lblFoo", root.getChildren()); 

      //Set Listeners 

      tfFooOne.textProperty().addListener((obserValue, oldValue, newValue) -> { 
       lblFoo.setText("new value: " + newValue); 
      }); 

      tfFooTwo.textProperty().addListener((obserValue, oldValue, newValue) -> { 
       lblFoo.setText("new value: " + newValue); 
      }); 

      btnFooOne.setOnAction((event) -> {lblFoo.setText("You pressed btnFooOne");}); 
      btnFooTwo.setOnAction((event) -> {lblFoo.setText("You pressed btnFooTwo");}); 

     } 
     catch (IOException ex) 
     { 
      Logger.getLogger(FXMLDocumentController.class.getName()).log(Level.SEVERE, null, ex); 
     } 
    } 

    private void loadBarPane() 
    { 
     try 
     { 
      //This way is more complicate if you have more than one of the same type of node 
      if(apMain.getChildren().size() > 0) 
      { 
       apMain.getChildren().remove(0);//if a node is loaded into apMain, remove the node. 
      } 
      Pane root = FXMLLoader.load(getClass().getResource("Bar.fxml")); 
      apMain.getChildren().add(root);//Add Foo Pane to apMain 

      //Get Bar Pane's children nodes 
      for(Node node : root.getChildren()) 
      { 
       if(node instanceof Button) 
       { 
        btnBar = (Button)node; 
       } 
       else if(node instanceof TextField) 
       { 
        tfBar = (TextField)node; 
       } 
       else if(node instanceof Label) 
       { 
        lblBar = (Label)node; 
       } 
      } 

      //Set listeners 
      tfBar.textProperty().addListener((obserValue, oldValue, newValue) -> { 
       lblBar.setText("new value: " + newValue); 
      }); 

      btnBar.setOnAction((event) -> {lblBar.setText("You pressed btnFooOne");}); 
     } 
     catch (IOException ex) 
     { 
      Logger.getLogger(FXMLDocumentController.class.getName()).log(Level.SEVERE, null, ex); 
     } 
    } 

    private Node findNodeByID(String id, ObservableList<Node> observableList) 
    { 
     for(Node node : observableList) 
     { 
      if(node.getId().equals(id)) 
      { 
       System.out.println("node found!"); 
       return node; 
      } 
      else 
      { 
       System.out.println("node not found yet!"); 
      } 
     } 

     return null; 
    } 


}

富FXML

<?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.Pane?> 

<Pane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="324.0" prefWidth="464.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1"> 
    <children> 
     <Button fx:id="btnFooOne" layoutX="84.0" layoutY="209.0" mnemonicParsing="false" text="Button" /> 
     <Button fx:id="btnFooTwo" layoutX="329.0" layoutY="209.0" mnemonicParsing="false" text="Button" /> 
     <TextField fx:id="tfFooOne" layoutX="36.0" layoutY="162.0" /> 
     <TextField fx:id="tfFooTwo" layoutX="281.0" layoutY="162.0" /> 
     <Label fx:id="lblFoo" layoutX="165.0" layoutY="39.0" text="You just loaded Foo Pane" /> 
    </children> 
</Pane>

酒吧FXML

<?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.Pane?> 

<Pane maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="324.0" prefWidth="464.0" xmlns="http://javafx.com/javafx/8.0.111" xmlns:fx="http://javafx.com/fxml/1"> 
    <children> 
     <Button fx:id="btnBar" layoutX="206.0" layoutY="186.0" mnemonicParsing="false" text="Button" /> 
     <TextField fx:id="tfBar" layoutX="158.0" layoutY="130.0" /> 
     <Label fx:id="lblBar" layoutX="160.0" layoutY="65.0" text="You just loaded Bar Pane" /> 
    </children> 
</Pane>

来源

2017-04-14 14:27:06 Sedrick

感谢您的解决方案，两者都有助于学习如何构建JavaFX。您能否继续扩展此评论？ '//如果您有多个相同类型的节点，这种方式会更复杂' –

很高兴能为您提供帮助。希望你解决了你的问题。 – Sedrick

我认为我可能在阅读对不起时编辑了最后一行，我提前输入。虽然问题出现了！ –

JavaFX切换BorderPane的中心：按钮只能工作一次

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