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javafx“borderpane不是有效类型。”

javafx java
  •  1
  • Eduardo Abreu  · 技术社区  · 6 年前

    在执行教程时出现此错误: 

        javafx.fxml.LoadException: BorderPane is not a valid type.
/C:/Users/Eduardo%20Abreu/Documents/Eclipse-Workspace/UnifacsProjeto/bin/projeto/resources/RootLayout.fxml

    at javafx.fxml.FXMLLoader.constructLoadException(FXMLLoader.java:2597)
    at javafx.fxml.FXMLLoader.createElement(FXMLLoader.java:2774)
    at javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2704)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2527)
    at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2441)
    at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2409)
    at projeto.MainApp.initRootLayout(MainApp.java:33)
    at projeto.MainApp.start(MainApp.java:24)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$161(LauncherImpl.java:863)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$174(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$172(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$173(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$147(WinApplication.java:177)
    at java.lang.Thread.run(Thread.java:748)
Exception in Application start method
java.lang.reflect.InvocationTargetException
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
    at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:767)
Caused by: java.lang.RuntimeException: Exception in Application start method
    at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$154(LauncherImpl.java:182)
    at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.NullPointerException
    at projeto.MainApp.showFilmeOverview(MainApp.java:48)
    at projeto.MainApp.start(MainApp.java:26)
    at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$161(LauncherImpl.java:863)
    at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$174(PlatformImpl.java:326)
    at com.sun.javafx.application.PlatformImpl.lambda$null$172(PlatformImpl.java:295)
    at java.security.AccessController.doPrivileged(Native Method)
    at com.sun.javafx.application.PlatformImpl.lambda$runLater$173(PlatformImpl.java:294)
    at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
    at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
    at com.sun.glass.ui.win.WinApplication.lambda$null$147(WinApplication.java:177)
    ... 1 more
Exception running application projeto.MainApp

    这是我的代码: 

    package projeto;


import java.io.IOException;

import ch.makery.address.MainApp;
import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

public class MainApp extends Application {

    private Stage primaryStage;
    private BorderPane rootLayout;

    @Override
    public void start(Stage primaryStage) {
        this.primaryStage = primaryStage;
        this.primaryStage.setTitle("CineTudo");

        initRootLayout();

        showFilmeOverview();
    }

    public void initRootLayout(){
        try {
            //Carrega o layout root do arquivo fxml
            FXMLLoader loader = new FXMLLoader(MainApp.class.getResource("resources/RootLayout.fxml"));
            rootLayout = (BorderPane) loader.load();
            Scene cena = new Scene(rootLayout);
            primaryStage.setScene(cena);
            primaryStage.show();

        } catch(IOException e) {
            e.printStackTrace();

       }
      }
        public void showFilmeOverview() {       
        try {
            FXMLLoader loader = new FXMLLoader();
            loader.setLocation((MainApp.class.getResource("resources/FilmeOverview.fxml")));
            AnchorPane filmeOverview = (AnchorPane) loader.load();
            rootLayout.setCenter(filmeOverview);
        }catch (IOException e){

            e.printStackTrace();
        }

        }
public Stage getPrimaryStage() {
            return primaryStage;
        }


public static void main(String[] args) {

    launch(args);
}
}

    以下是教程代码: 

    package ch.makery.address;

import java.io.IOException;

import javafx.application.Application;
import javafx.fxml.FXMLLoader;
import javafx.scene.Scene;
import javafx.scene.layout.AnchorPane;
import javafx.scene.layout.BorderPane;
import javafx.stage.Stage;

public class MainApp extends Application {

    private Stage primaryStage;
    private BorderPane rootLayout;

    @Override
    public void start(Stage primaryStage) {
        this.primaryStage = primaryStage;
        this.primaryStage.setTitle("AddressApp");

        initRootLayout();

        showPersonOverview();
    }

    /**
     * Initializes the root layout.
     */
    public void initRootLayout() {
        try {
            // Load root layout from fxml file.
            FXMLLoader loader = new FXMLLoader();
            loader.setLocation(MainApp.class.getResource("view/RootLayout.fxml"));
            rootLayout = (BorderPane) loader.load();

            // Show the scene containing the root layout.
            Scene scene = new Scene(rootLayout);
            primaryStage.setScene(scene);
            primaryStage.show();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * Shows the person overview inside the root layout.
     */
    public void showPersonOverview() {
        try {
            // Load person overview.
            FXMLLoader loader = new FXMLLoader();
            loader.setLocation(MainApp.class.getResource("view/PersonOverview.fxml"));
            AnchorPane personOverview = (AnchorPane) loader.load();

            // Set person overview into the center of root layout.
            rootLayout.setCenter(personOverview);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * Returns the main stage.
     * @return
     */
    public Stage getPrimaryStage() {
        return primaryStage;
    }

    public static void main(String[] args) {
        launch(args);
    }
}

    我在fxml文件中没有任何ID,教程中也没有,我创建了filmeoverview.fxml作为anchorbane,rootlayout作为borderpane,我尝试更改方法的位置,但它不起作用,有人知道如何解决这个问题吗?

    编辑:这是fxml文件: 

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

<?import com.jfoenix.controls.JFXButton?>
<?import javafx.geometry.Insets?>
<?import javafx.scene.control.ButtonBar?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.control.SplitPane?>
<?import javafx.scene.control.TableColumn?>
<?import javafx.scene.control.TableView?>
<?import javafx.scene.layout.AnchorPane?>
<?import javafx.scene.layout.ColumnConstraints?>
<?import javafx.scene.layout.GridPane?>
<?import javafx.scene.layout.RowConstraints?>
<?import javafx.scene.text.Font?>

<AnchorPane prefHeight="500.0" prefWidth="800.0" xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1">
   <children>
      <SplitPane dividerPositions="0.29797979797979796" layoutX="191.0" layoutY="120.0" prefHeight="400.0" prefWidth="600.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
        <items>
          <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="160.0" prefWidth="100.0">
               <children>
                  <TableView layoutX="-25.0" layoutY="46.0" prefHeight="398.0" prefWidth="175.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
                    <columns>
                      <TableColumn prefWidth="75.0" text="Filme" />
                      <TableColumn prefWidth="75.0" text="Sala" />
                        <TableColumn prefWidth="75.0" text="Categoria" />
                    </columns>
                     <columnResizePolicy>
                        <TableView fx:constant="CONSTRAINED_RESIZE_POLICY" />
                     </columnResizePolicy>
                  </TableView>
               </children>
            </AnchorPane>
          <AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="160.0" prefWidth="100.0">
               <children>
                  <Label layoutX="14.0" layoutY="14.0" text="Detalhes do Filme">
                     <font>
                        <Font name="Open Sans Light" size="15.0" />
                     </font>
                  </Label>
                  <GridPane layoutX="14.0" layoutY="49.0" prefHeight="268.0" prefWidth="547.0" AnchorPane.leftAnchor="5.0" AnchorPane.rightAnchor="5.0" AnchorPane.topAnchor="49.0">
                    <columnConstraints>
                      <ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
                      <ColumnConstraints hgrow="SOMETIMES" minWidth="10.0" prefWidth="100.0" />
                    </columnConstraints>
                    <rowConstraints>
                      <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
                      <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
                      <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
                        <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
                        <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
                        <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
                        <RowConstraints minHeight="10.0" prefHeight="30.0" vgrow="SOMETIMES" />
                    </rowConstraints>
                     <children>
                        <Label text="Título:">
                           <font>
                              <Font size="16.0" />
                           </font>
                           <GridPane.margin>
                              <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
                           </GridPane.margin>
                        </Label>
                        <Label layoutX="20.0" layoutY="17.0" text="Sala:" GridPane.rowIndex="1">
                           <font>
                              <Font size="16.0" />
                           </font>
                           <GridPane.margin>
                              <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
                           </GridPane.margin>
                        </Label>
                        <Label layoutX="20.0" layoutY="55.0" text="Categoria:" GridPane.rowIndex="2">
                           <font>
                              <Font size="16.0" />
                           </font>
                           <GridPane.margin>
                              <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
                           </GridPane.margin>
                        </Label>
                        <Label text="Diretor:" GridPane.rowIndex="3">
                           <font>
                              <Font size="16.0" />
                           </font>
                           <GridPane.margin>
                              <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
                           </GridPane.margin>
                        </Label>
                        <Label text="Duração:" GridPane.rowIndex="4">
                           <font>
                              <Font size="16.0" />
                           </font>
                           <GridPane.margin>
                              <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
                           </GridPane.margin>
                        </Label>
                        <Label text="Protagonista:" GridPane.rowIndex="5">
                           <font>
                              <Font size="16.0" />
                           </font>
                           <GridPane.margin>
                              <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
                           </GridPane.margin>
                        </Label>
                        <Label text="Classificação:" GridPane.rowIndex="6">
                           <font>
                              <Font size="16.0" />
                           </font>
                           <GridPane.margin>
                              <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
                           </GridPane.margin>
                        </Label>
                        <Label text="Label" GridPane.columnIndex="1">
                           <GridPane.margin>
                              <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
                           </GridPane.margin>
                           <font>
                              <Font name="Roboto" size="16.0" />
                           </font>
                        </Label>
                        <Label text="Label" GridPane.columnIndex="1" GridPane.rowIndex="1">
                           <font>
                              <Font name="Roboto" size="16.0" />
                           </font>
                           <GridPane.margin>
                              <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
                           </GridPane.margin>
                        </Label>
                        <Label text="Label" GridPane.columnIndex="1" GridPane.rowIndex="2">
                           <font>
                              <Font name="Roboto" size="16.0" />
                           </font>
                           <GridPane.margin>
                              <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
                           </GridPane.margin>
                        </Label>
                        <Label text="Label" GridPane.columnIndex="1" GridPane.rowIndex="3">
                           <font>
                              <Font name="Roboto" size="16.0" />
                           </font>
                           <GridPane.margin>
                              <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
                           </GridPane.margin>
                        </Label>
                        <Label text="Label" GridPane.columnIndex="1" GridPane.rowIndex="4">
                           <font>
                              <Font name="Roboto" size="16.0" />
                           </font>
                           <GridPane.margin>
                              <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
                           </GridPane.margin>
                        </Label>
                        <Label text="Label" GridPane.columnIndex="1" GridPane.rowIndex="5">
                           <font>
                              <Font name="Roboto" size="16.0" />
                           </font>
                           <GridPane.margin>
                              <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
                           </GridPane.margin>
                        </Label>
                        <Label text="Label" GridPane.columnIndex="1" GridPane.rowIndex="6">
                           <font>
                              <Font name="Roboto" size="16.0" />
                           </font>
                           <GridPane.margin>
                              <Insets bottom="10.0" left="10.0" right="10.0" top="10.0" />
                           </GridPane.margin>
                        </Label>
                     </children>
                  </GridPane>
                  <ButtonBar layoutX="276.0" layoutY="425.0" prefHeight="59.0" prefWidth="267.0">
                     <buttons>
                        <JFXButton style="-fx-background-color: #00BCD4;" text="Adicionar" />
                        <JFXButton style="-fx-background-color: #03A9F4;" text="Editar" />
                        <JFXButton style="-fx-background-color: #F44336;" text="Deletar" />
                     </buttons>
                  </ButtonBar>
               </children>
            </AnchorPane>
        </items>
      </SplitPane>
   </children>
</AnchorPane>

    编辑2:这里是rootlayout.fxml: 

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

<?import javafx.scene.control.Menu?>
<?import javafx.scene.control.MenuBar?>
<?import javafx.scene.control.MenuItem?>
<?import javafx.scene.layout.AnchorPane?>

<BorderPane prefHeight="500.0" prefWidth="800.0" xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1">
   <children>
      <MenuBar layoutY="2.0" prefHeight="25.0" prefWidth="800.0">
        <menus>
          <Menu mnemonicParsing="false" text="Arquivo">
            <items>
              <MenuItem mnemonicParsing="false" text="Fechar" />
            </items>
          </Menu>
          <Menu mnemonicParsing="false" text="Editar">
            <items>
              <MenuItem mnemonicParsing="false" text="Deletar" />
            </items>
          </Menu>
          <Menu mnemonicParsing="false" text="Ajuda">
            <items>
              <MenuItem mnemonicParsing="false" text="Sobre" />
            </items>
          </Menu>
        </menus>
      </MenuBar>
   </children>
</AnchorPane>

    这不是重复的,更改导入不能修复它,我仍然可以

    原因:javax.xml.stream.xmlstreamException:ParseError at [行,列]:[31,3]

    1 回复  |  直到 6 年前
        1
  •  2
  •   jewelsea    6 年前

    您有几个问题:

    1. fxml没有 import statement 对于 javafx.scene.layout.BorderPane .
    2. 你的 rootLayout.fxml 文件是无效的fxml。使用anchorbane标记关闭borderpane元素。
    3. 您将边框窗格的内容定义为子级,在子级中,它们应该由位置定义。

    样本有效的fxml,并修复上述问题: 

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

<?import javafx.scene.control.*?>
<?import javafx.scene.layout.BorderPane?>

<BorderPane prefHeight="500.0" prefWidth="800.0" xmlns="http://javafx.com/javafx/8.0.171" xmlns:fx="http://javafx.com/fxml/1">
    <top>
        <MenuBar layoutY="2.0" prefHeight="25.0" prefWidth="800.0">
            <menus>
                <Menu mnemonicParsing="false" text="Arquivo">
                    <items>
                        <MenuItem mnemonicParsing="false" text="Fechar" />
                    </items>
                </Menu>
                <Menu mnemonicParsing="false" text="Editar">
                    <items>
                        <MenuItem mnemonicParsing="false" text="Deletar" />
                    </items>
                </Menu>
                <Menu mnemonicParsing="false" text="Ajuda">
                    <items>
                        <MenuItem mnemonicParsing="false" text="Sobre" />
                    </items>
                </Menu>
            </menus>
        </MenuBar>
    </top>
</BorderPane>

    另外,我建议您下载 Gluon SceneBuilder 然后用它编辑fxml。

    还要注意,一些IDE,例如 IntelliJ ,包括代码完成、类型检查和语法检查,这将在将文件加载到IDE时突出显示文档中的许多上述错误。

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