如何将主菜单连接到游戏中？

Question

public class MainMenu extends SnakeAndLadder {
    private Group tileGroup = new Group();
    public boolean started=false;

    private Parent createConetent(){
        StackPane root = new StackPane();
        root.setPrefSize(width* tileSize,(height* tileSize)+80);
        root.getChildren().addAll(tileGroup);

        Button start = new Button("Start");
        start.setTranslateX(10);
        start.setTranslateY(-500);
        start.setPrefSize(300,150);
        start.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                gameStarted();
            }
        });

        Button exit = new Button("Exit");
        exit.setTranslateX(10);
        exit.setTranslateY(-300);
        exit.setPrefSize(300,150);
        exit.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                System.exit(0);
            }
        });
        tileGroup.getChildren().addAll(start,exit);

        return root;
    }

    @Override
    public void start(Stage primaryStage)throws Exception{
        Scene scene = new Scene(createConetent());
        primaryStage.setTitle("Snake And Ladder");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

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

我使用extend来获得与主游戏相同的GUI大小。但是，当我单击开始按钮时，出现错误。

我对此并不陌生，我不确定它是否可以那样工作，所以我想请您提出建议。任何帮助将不胜感激。

这是游戏的代码：

public class SnakeAndLadder extends Application {

    public static final int tileSize = 80;
    public static final int width = 10;
    public static final int height = 10;


    public Group titleGroup = new Group();

    private Parent createContent(){

        Pane root = new Pane();
        root.setPrefSize(width * tileSize, (height * tileSize) + 80);
        root.getChildren().addAll(titleGroup);

        for(int i=0; i<width; i++){
            for(int j=0; j<height; j++){
                Tile tile = new Tile(tileSize, tileSize);
                tile.setTranslateX(j * tileSize);
                tile.setTranslateY(i * tileSize);
                titleGroup.getChildren().add(tile);

            }

        }
        return root;

    }

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

        Scene scene = new Scene(createContent());
        primaryStage.setTitle("Quiz Snake and Ladder Game");
        primaryStage.setResizable(false);
        primaryStage.setScene(scene);
        primaryStage.show();


    }

       public void gameStarted() {
            launch();

    }
}

Answer 1

package sample;

import javafx.animation.TranslateTransition;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.Group;
import javafx.scene.Parent;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.image.Image;
import javafx.scene.image.ImageView;
import javafx.scene.layout.Pane;
import javafx.scene.layout.StackPane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Circle;
import javafx.scene.text.Font;
import javafx.scene.text.Text;
import javafx.stage.Stage;
import javafx.util.Duration;
import javax.swing.*;

public class SnakeAndLadder extends Application {

    public static final int tileSize = 80;
    public static final int width = 10;
    public static final int height = 10;

    public Group titleGroup = new Group();

    private Parent createContent(){

        Pane root = new Pane();
        root.setPrefSize(width * tileSize, (height * tileSize) + 80);
        root.getChildren().addAll(titleGroup);

        for(int i=0; i<(width-.14); i++){
            for(int j=0; j<height; j++){
                Tile tile = new Tile(tileSize, tileSize);
                tile.setTranslateX(j * tileSize);
                tile.setTranslateY(i * tileSize);
                titleGroup.getChildren().add(tile);

            }

        }
       return root;

        }

    //@Override
    public void start(Stage primaryStage)throws Exception {


        Scene scene1 = new Scene(createConetent(primaryStage));
        primaryStage.setTitle("Main Menu");
        primaryStage.setScene(scene1);
        primaryStage.show();


    }

    private Parent createConetent(Stage primaryStage)throws Exception{
        Pane root = new Pane();
        root.setPrefSize(width* tileSize,height* tileSize);
        root.getChildren().addAll(titleGroup);

        Button start = new Button("Start");
        start.setTranslateX(253);
        start.setTranslateY(100);
        start.setPrefSize(300,150);
        start.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                gameStarted=true;
                Scene scene = new Scene(createContent());
                primaryStage.setTitle("Quiz Snake and Ladder Game");
                primaryStage.setResizable(false);
                primaryStage.setScene(scene);
                primaryStage.show();
            }
        });




        Button exit = new Button("Exit");
        exit.setTranslateX(253);
        exit.setTranslateY(540);
        exit.setPrefSize(300,150);
        exit.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {
                System.exit(0);
            }
        });

        Image img = new Image("MenuBG.jpg");
        ImageView imageView = new ImageView();
        imageView.setImage(img);
        imageView.setFitWidth(800);
        imageView.setFitHeight(800);

        Button how = new Button("How to play");
        how.setTranslateX(253);
        how.setTranslateY(320);
        how.setPrefSize(300,150);
        how.setOnAction(new EventHandler<ActionEvent>() {
            @Override
            public void handle(ActionEvent event) {

            }
        });

        titleGroup.getChildren().addAll(imageView,start,exit,how);


        return root;

    }


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

}