JavaFx“BorderPane 不是有效类型。”
[英]JavaFx “BorderPane is not a valid type.”
问题描述
我在学习教程时遇到了这个错误：
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);
}
}
这是教程代码：
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 文件上没有任何 id，教程中也没有，我将 FilmeOverview.fxml 创建为 AnchorPane，将 RootLayout 创建为 BorderPane，我尝试更改方法的位置，但它不起作用，是吗有人知道怎么修这个东西吗？
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，更改导入并不能解决它，我仍然得到
引起：javax.xml.stream.XMLStreamException: ParseError at [row,col]:[31,3]
1 个解决方案
解决方案1
2 已采纳 2018-05-22 17:31:27
你有几个问题：
- FXML 没有
javafx.scene.layout.BorderPane的导入语句。 - 您的
rootLayout.fxml文件是无效的 FXML。 您使用 AnchorPane 标记关闭 BorderPane 元素。 - 您将边框窗格的内容定义为子项，它们应该由位置定义。
修复了上述问题的有效 FXML 示例：
<?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>
顺便说一句，我建议下载Gluon SceneBuilder并使用它来编辑您的 FXML。
另请注意，某些 IDE（例如IntelliJ ）包括代码完成、类型检查和语法检查，当您将文件加载到 IDE 时，它们会突出显示文档中的许多上述错误。
BorderPane javafx的背景
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