Scene change in javafx

Question

public class MainApp extends Application { public Stage primaryStage = new Stage(); ImageView iv1; public void start( Stage primaryStage) { AnchorPane root= new AnchorPane(); Scene scene1 = new Scene(root,600,400); primaryStage.setTitle("SocOpros"); Image img = new Image("bgg.png"); iv1 = new ImageView(); iv1.setImage(img); iv1.setVisible(true); Button btn = new Button("TEST");//создание кнопки btn.setVisible(true); btn.setLayoutX(20); btn.setLayoutY(40); root.getChildren().addAll(iv1,btn); btn.setOnAction(new RotateImg());//установка действия на кнопку primaryStage.setScene(scene1); primaryStage.show(); } public static void main(String[] args) { launch(args); } public class RotateImg implements EventHandler<ActionEvent>{ @Override public void handle(ActionEvent arg0) { Stage stage = new Stage(); AnchorPane root2= new AnchorPane(); Scene scene2 = new Scene(root2,600,400); stage.setScene(scene2); stage.show(); } } }

When you click on the button, a new window appears as needed. But it is also necessary to close the previous window, but I do not know how to make the primary stage a global object, so that it can work with it in the RotateImg method.

arachnoden arachnoden 752 one eight 31 · Answer 1 · 2016-07-02T11:45:47

Option 1: Change the listener so that when opening the window it closes the previous one:

 btn.setOnAction(lsn -> { new RotateImg(); primaryStage.close(); });

Option 2: You write "so that you can work with it in the RotateImg method," but you do not have a method there but an internal class, if you replace it with a method, then you can pass the Stage to it and close it, or do anything with it this method:

 public class JavaFXApplication23 extends Application { public Stage primaryStage = new Stage(); ImageView iv1; public void start( Stage primaryStage) { AnchorPane root= new AnchorPane(); Scene scene1 = new Scene(root,600,400); primaryStage.setTitle("SocOpros"); Image img = new Image("bgg.png"); iv1 = new ImageView(); iv1.setImage(img); iv1.setVisible(true); Button btn = new Button("TEST");//создание кнопки btn.setVisible(true); btn.setLayoutX(20); btn.setLayoutY(40); root.getChildren().addAll(iv1,btn); btn.setOnAction(rotat ->{//кнопка теперь исполняет метод при нажатии rotateImg(primaryStage);//методу передается сцена в качестве аргумента }); primaryStage.setScene(scene1); primaryStage.show(); } public static void main(String[] args) { launch(args); } public void rotateImg(Stage stg){ stg.close();//закрываем предыдущую сцену. Stage stage = new Stage(); AnchorPane root2= new AnchorPane(); Scene scene2 = new Scene(root2,600,400); stage.setScene(scene2); stage.show(); } }

Thank you very much, but in the first method, the window closes first and the second does not open.

Scene change in javafx

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