如何使用FXMLLoader.load() - JavaFX 2

时间:2012-12-06 23:03:13

标签: java javafx-2 fxml scenebuilder

我正在使用JavaFX构建JavaFX Scene Builder应用程序。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,但是有一个问题,因为load()方法返回一个Object,并且构建一个Scene我需要一个Parent的实例类。

下面是我的MainClass的一部分。编译器发出错误,因为页面的类型不是Parent:

Object page = FXMLLoader.load(MainWindowController.class.getResource("main.fxml"));
Scene scene = new Scene(page);
primaryStage.setScene(scene);
primaryStage.show();

如何使编译和运行正确?

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>

2 个答案:

答案 0 :(得分:13)

由于有多种实体有资格通过FXML加载,您需要自己说明预期的类型。

Parent page = FXMLLoader.<Parent>load(MainWindowController.class.getResource("main.fxml").toExternalForm());

答案 1 :(得分:7)

试试这个

Parent root= FXMLLoader.load(getClass().getResource("mention the path to your fxml file");

希望这会有所帮助