如何在JavaFX中將當前場景更改爲另一場景？

Question

在舞臺上有一個主舞臺和一個控制器，單擊時，我想將當前場景更改爲下一個，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(); 
} 

而且second.fxml可以是你喜歡的任何FXML。它非常簡單，你只需要從加載器獲取控制器並將Application類的實例傳遞給它。

請注意，這是我的代碼的簡短版本，我不得不刪除一些簡單的東西，所以它可能不會工作，如果你只是複製&粘貼。如果我錯過了任何事情，請告訴我。