如何在JavaFX中将当前场景更改为另一个场景

Question

舞台上有一个主舞台和一个控制器，当点击一个按钮时，我想将当前场景更改为下一个场景，如何操作？

Answer 1

Main.java：

@Override
public void start(Stage primaryStage) throws Exception{
    FXMLLoader loader = new FXMLLoader();
    Parent root = (Parent) loader.load(getClass().getResource("first.fxml").openStream());
    FirstController firstController = loader.getController();
    firstController.setStage(primaryStage);
    primaryStage.setTitle("Stage");
    primaryStage.setScene(new Scene(root));
    primaryStage.show();
}

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

first.fxml:

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.*?>
<GridPane fx:controller="sample.FirstController"
      xmlns:fx="http://javafx.com/fxml" alignment="center" hgap="10" vgap="10">
    <Label text="first scene" GridPane.columnIndex="0" GridPane.rowIndex="0"/>
    <Button text="second" onAction="#second" GridPane.columnIndex="0" GridPane.rowIndex="1" />
</GridPane>

FirstController.java：

private Stage mStage;
public void setStage(Stage mStage) {
    this.mStage = mStage;
}

public void second(ActionEvent actionEvent) throws IOException {
    FXMLLoader loader = new FXMLLoader();
    Parent root = (Parent)      loader.load(getClass().getResource("second.fxml").openStream());
    SecondController secondController = loader.getController();
    secondController.setStage(mStage);
    mStage.setTitle("second scene");
    mStage.setScene(new Scene(root));
    mStage.show();
}

second.fxml

<?import javafx.scene.control.Button?>
<?import javafx.scene.control.Label?>
<?import javafx.scene.layout.*?>
<GridPane fx:controller="sample.SecondController"
      xmlns:fx="http://javafx.com/fxml" alignment="center" hgap="10" vgap="10">
    <Label text="second scene" GridPane.columnIndex="0" GridPane.rowIndex="0"/>
    <Button text="first" onAction="#first" GridPane.columnIndex="0" GridPane.rowIndex="1" />
</GridPane>

SecondController.java

private Stage mStage;
public void setStage(Stage mStage) {
    this.mStage = mStage;
}

public void first(ActionEvent actionEvent) throws IOException {
    FXMLLoader loader = new FXMLLoader();
    Parent root = (Parent) loader.load(getClass().getResource("first.fxml").openStream());
    FirstController firstController = loader.getController();
    firstController.setStage(mStage);
    mStage.setTitle("first scene");
    mStage.setScene(new Scene(root));
    mStage.show();
}

second.fxml可以是任何你喜欢的fxml。这非常简单，您只需要从加载程序中获取控制器，并将应用程序类的实例传递给它

注意，这是我的代码的简短版本，为了简单起见，我不得不删除一些内容，所以如果你只复制&粘贴如果我错过了什么，请告诉我。