我正在使用JavaFX Scene Builder 构建JavaFX应用程序。该界面是在 Scene Builder 中创建的,并创建了一个FXML文件 (main.fxml)。
要在我的应用程序中使用该接口,我必须使用FXMLLoader加载 FXML 文件,但存在一个问题,因为 load() 方法返回一个对象,并且要构建一个场景,我需要一个 Parent 类的实例。
下面是我的 MainClass 的一部分。编译器给出错误,因为页面不是 Parent 类型:
Object page = FXMLLoader.load(MainWindowController.class.getResource("main.fxml"));
Scene scene = new Scene(page);
primaryStage.setScene(scene);
primaryStage.show();
我该怎么做才能使这个编译和运行正确?
这是 FXML 文件 (main.fxml):
<?xml version="1.0" encoding="UTF-8"?>
<?import java.lang.*?>
<?import java.util.*?>
<?import javafx.scene.control.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.paint.*?>
<AnchorPane id="AnchorPane" maxHeight="-Infinity" maxWidth="-Infinity" minHeight="-Infinity" minWidth="-Infinity" prefHeight="400.0" prefWidth="600.0" xmlns:fx="http://javafx.com/fxml">
<children>
<VBox prefHeight="400.0" prefWidth="600.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<children>
<MenuBar minHeight="21.0" prefHeight="21.0" prefWidth="600.0">
<menus>
<Menu mnemonicParsing="false" text="File">
<items>
<MenuItem mnemonicParsing="false" text="Close" />
</items>
</Menu>
<Menu mnemonicParsing="false" text="Edit">
<items>
<MenuItem mnemonicParsing="false" text="Delete" />
</items>
</Menu>
<Menu mnemonicParsing="false" text="Help">
<items>
<MenuItem mnemonicParsing="false" text="About" />
</items>
</Menu>
</menus>
</MenuBar>
<ToolBar minHeight="24.0">
<items>
<Button fx:id="btFormat" mnemonicParsing="false" text="FORMAT" />
<Button fx:id="btUnformat" mnemonicParsing="false" text="Unformat" />
<Button fx:id="btAutoIndent" mnemonicParsing="false" text="Auto-indent" />
<CheckBox fx:id="cbShowLineNumber" mnemonicParsing="false" text="Show line number" />
</items>
</ToolBar>
<SplitPane dividerPositions="0.5" focusTraversable="true" orientation="VERTICAL" prefHeight="348.0" prefWidth="600.0">
<items>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="100.0" prefWidth="160.0">
<children>
<VBox prefHeight="170.0" prefWidth="598.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<children>
<Label text="INPUT - Paste your code here" />
<TextArea fx:id="taInput" prefWidth="200.0" wrapText="true" />
</children>
</VBox>
</children>
</AnchorPane>
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="100.0" prefWidth="160.0">
<children>
<VBox prefHeight="170.0" prefWidth="598.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<children>
<Label text="OUTPUT - The formatted code" />
<TextArea fx:id="taOutput" prefWidth="200.0" wrapText="true" />
</children>
</VBox>
</children>
</AnchorPane>
</items>
</SplitPane>
</children>
</VBox>
</children>
</AnchorPane>