在Java FX中切换场景时如何保持窗口大小？

我只是试图弄清楚当我改变场景时为什么窗口大小（我设置为全屏）正在改变，是否有一种方法（即一个命令）可以发出一次让Java FX知道不要改变大小？

import javafx.application.Application; import javafx.geometry.Pos; import javafx.scene.Scene; import javafx.scene.control.Button; import javafx.scene.control.ContentDisplay; import javafx.scene.image.Image; import javafx.scene.image.ImageView; import javafx.scene.layout.BorderPane; import javafx.scene.layout.HBox; import javafx.scene.layout.StackPane; import javafx.stage.Stage; public class Main extends Application { Scene scene,scene_2; public static void main(String[] args) { launch(args); } @Override public void start(Stage Win_primary) throws Exception { Win_primary.setTitle("AN-0"); Button start,exit_pro,back_to_start; start= new Button(); start.setText("Start"); Image exit_door = new Image("file:C:\\Users\\MyPc\\Pictures\\FX\\vector-icons_05-128 (2).png"); exit_pro= new Button (); exit_pro.setGraphic(new ImageView(exit_door)); start.setStyle( "-fx-background-radius: 100em; " + "-fx-min-width: 200px; " + "-fx-min-height: 200px; " + "-fx-max-width: 200px; " + "-fx-max-height: 170px;" + "-fx-font-size: 20px" ); exit_pro.setMaxSize(50, 50); exit_pro.setOnAction(e -> Win_primary.close()); StackPane layout = new StackPane(); layout.setStyle("-fx-background-color: #FFFFFF ;"); layout.getChildren().add(start); layout.setAlignment(exit_pro, Pos.BOTTOM_CENTER); layout.getChildren().add(exit_pro); start.setOnAction(e -> { Win_primary.setScene(scene_2); }); scene = new Scene(layout, 300, 250); //scene 2 StackPane layout2 = new StackPane(); back_to_start = new Button("Cancel"); layout2.setStyle("-fx-background-color: #FFFFFF ;"); layout2.getChildren().add(back_to_start); layout.setAlignment(back_to_start, Pos.BOTTOM_CENTER); scene_2 = new Scene (layout2,300,250); back_to_start.setOnAction(e -> Win_primary.setScene(scene)); Win_primary.setScene(scene); Win_primary.setMinHeight(700); Win_primary.setMinWidth(700); Win_primary.setMaximized(true); Win_primary.setFullScreen(true); Win_primary.show(); } } 

Answer 1

我有同样的问题，最终没有改变场景，但只是场景的根。 所以代替：

 start.setOnAction(e -> { Win_primary.setScene(scene_2); }); 

你会写：

 start.setOnAction(e -> {Win_primary.getScene().setRoot(layout2)}); 

Answer 2

我喜欢这样做：

 StackPane layout = new StackPane(); layout.getChildren().add(exit_pro); layout.getChildren().add(back_to_start); start.setOnAction(e -> { back_to_start.toFront(); exit_pro.setVisible(false); }); back_to_start.setOnAction(e -> { exit_pro.toFront(); back_to_start.setVisible(false); }); 

切换StackPane的孩子就像切换两个场景一样。