package sample;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.stage.Stage;


public class Main extends Application {

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

    @Override
    public void start(Stage primaryStage) throws Exception {
        // 实例化按钮
        Button button1 = new Button("this is a button");
        StackPane stackPane = new StackPane();

        // 将button添加到布局
        stackPane.getChildren().add(button1);
        Scene scene = new Scene(stackPane, 400, 400);
        primaryStage.setScene(scene);
        primaryStage.show();
    }
}

package sample;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.StackPane;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;


public class Main extends Application {
    Scene sceneOne,sceneTwo;
    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage primaryStage) throws Exception {
        Button button1 = new Button("buttonOne");
        // 点击事件监听 点击后切换到1
        button1.setOnMouseClicked(e -> {
            primaryStage.setScene(sceneTwo);
        });

        VBox vBox = new VBox();
        vBox.getChildren().add(button1);
        sceneOne = new Scene(vBox, 400, 400);

        Button button2 = new Button("buttonTwo");
        // 点击事件监听 点击后切换到2
        button2.setOnMouseClicked(e -> {
            primaryStage.setScene(sceneOne);
        });

        StackPane stackPane = new StackPane();
        stackPane.getChildren().add(button2);
        sceneTwo = new Scene(stackPane, 400, 400);

        primaryStage.setScene(sceneOne);
        primaryStage.show();
    }
}

package sample;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;


public class Main extends Application {
    private Stage stage;

    @Override
    public void start(Stage primaryStage) throws Exception {
        stage = primaryStage;

        stage.setOnCloseRequest(event -> {
            event.consume();
            handleClose();
        });

        Button button = new Button("Close the Window");

        button.setOnMouseClicked(event -> handleClose());

        VBox vBox = new VBox();
        vBox.getChildren().add(button);
        Scene scene = new Scene(vBox, 400, 400);

        stage.setScene(scene);
        stage.show();
    }

    public void handleClose() {
        boolean ret = WindowCard.index("Close the Window", "Whether to close the window？");
        System.out.println(ret);
        if (ret) {
            stage.close();
        }
    }

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

package sample;

import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.VBox;
import javafx.stage.Modality;
import javafx.stage.Stage;

public class WindowCard {
    public static boolean res;

    public static boolean index(String title, String msg) {
        Stage stage = new Stage();

        stage.initModality(Modality.APPLICATION_MODAL);
        stage.setTitle(title);

        Button buttonYes = new Button("yes");
        buttonYes.setOnMouseClicked(event -> {
            res = true;
            stage.close();
        });

        Button buttonNo = new Button("no");
        buttonNo.setOnMouseClicked(event -> {
            res = false;
            stage.close();
        });

        Label label = new Label(msg);
        VBox vBox = new VBox();
        vBox.getChildren().addAll(label, buttonYes, buttonNo);
        vBox.setAlignment(Pos.CENTER);
        Scene scene = new Scene(vBox, 200, 200);
        stage.setScene(scene);
        stage.showAndWait();

        return res;
    }
}