用JAVAFX编写一个农夫过河游戏代码

以下是一个简单的农夫过河游戏的 JavaFX 代码示例：

import javafx.application.Application;
import javafx.geometry.Pos;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.scene.control.Label;
import javafx.scene.layout.HBox;
import javafx.scene.layout.VBox;
import javafx.stage.Stage;

public class FarmerCrossingRiver extends Application {

    // 定义四个人物和船的位置，0 表示左岸，1 表示右岸
    private int farmerPos = 0;
    private int wolfPos = 0;
    private int goatPos = 0;
    private int cabbagePos = 0;
    private int boatPos = 0;

    // 定义游戏界面元素
    private Label statusLabel;
    private Button farmerButton;
    private Button wolfButton;
    private Button goatButton;
    private Button cabbageButton;
    private Button boatButton;
    private Button resetButton;

    @Override
    public void start(Stage primaryStage) throws Exception {
        // 初始化游戏界面元素
        statusLabel = new Label("农夫要把狼、羊、菜和自己运到对岸。但船太小，只能装下农夫和一样东西。");
        farmerButton = new Button("农夫");
        wolfButton = new Button("狼");
        goatButton = new Button("羊");
        cabbageButton = new Button("菜");
        boatButton = new Button("船");
        resetButton = new Button("重新开始");

        // 设置按钮点击事件
        farmerButton.setOnAction(event -> move(farmerButton));
        wolfButton.setOnAction(event -> move(wolfButton));
        goatButton.setOnAction(event -> move(goatButton));
        cabbageButton.setOnAction(event -> move(cabbageButton));
        boatButton.setOnAction(event -> move(boatButton));
        resetButton.setOnAction(event -> reset());

        // 初始化游戏界面布局
        HBox leftBox = new HBox(farmerButton, wolfButton, goatButton, cabbageButton);
        HBox rightBox = new HBox();
        VBox vbox = new VBox(statusLabel, leftBox, rightBox, boatButton, resetButton);
        vbox.setSpacing(10);
        vbox.setAlignment(Pos.CENTER);

        // 设置游戏界面
        Scene scene = new Scene(vbox, 400, 300);
        primaryStage.setTitle("农夫过河");
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    // 移动人物或船
    private void move(Button button) {
        String text = button.getText();
        if (text.equals("农夫")) {
            if (farmerPos == boatPos) {
                farmerPos = 1 - farmerPos;
                boatPos = 1 - boatPos;
                setButtonPosition(farmerButton, farmerPos);
                setButtonPosition(boatButton, boatPos);
            } else {
                setStatus("农夫必须在船上");
            }
        } else if (text.equals("狼")) {
            if (wolfPos == farmerPos && wolfPos == boatPos) {
                wolfPos = 1 - wolfPos;
                boatPos = 1 - boatPos;
                setButtonPosition(wolfButton, wolfPos);
                setButtonPosition(boatButton, boatPos);
                if (!checkStatus()) {
                    setStatus("狼吃了羊！");
                }
            } else {
                setStatus("狼必须和农夫在同一岸边");
            }
        } else if (text.equals("羊")) {
            if (goatPos == farmerPos && goatPos == boatPos) {
                goatPos = 1 - goatPos;
                boatPos = 1 - boatPos;
                setButtonPosition(goatButton, goatPos);
                setButtonPosition(boatButton, boatPos);
                if (!checkStatus()) {
                    setStatus("羊吃了菜！");
                }
            } else {
                setStatus("羊必须和农夫在同一岸边");
            }
        } else if (text.equals("菜")) {
            if (cabbagePos == farmerPos && cabbagePos == boatPos) {
                cabbagePos = 1 - cabbagePos;
                boatPos = 1 - boatPos;
                setButtonPosition(cabbageButton, cabbagePos);
                setButtonPosition(boatButton, boatPos);
                if (!checkStatus()) {
                    setStatus("菜被羊吃了！");
                }
            } else {
                setStatus("菜必须和农夫在同一岸边");
            }
        } else if (text.equals("船")) {
            if (boatPos == farmerPos) {
                boatPos = 1 - boatPos;
                setButtonPosition(boatButton, boatPos);
            } else {
                setStatus("农夫必须在船上");
            }
        }
    }

    // 设置人物或船的位置
    private void setButtonPosition(Button button, int pos) {
        HBox leftBox = (HBox) ((VBox) button.getParent()).getChildren().get(1);
        HBox rightBox = (HBox) ((VBox) button.getParent()).getChildren().get(2);
        if (pos == 0) {
            leftBox.getChildren().add(button);
            rightBox.getChildren().remove(button);
        } else {
            rightBox.getChildren().add(button);
            leftBox.getChildren().remove(button);
        }
    }

    // 检查游戏是否结束
    private boolean checkStatus() {
        if (wolfPos == 1 && goatPos == 1 && cabbagePos == 1) {
            setStatus("恭喜你，过河成功！");
            return true;
        } else if (farmerPos != wolfPos && farmerPos == goatPos) {
            return false;
        } else if (farmerPos != cabbagePos && farmerPos == goatPos) {
            return false;
        } else {
            return true;
        }
    }

    // 设置状态信息
    private void setStatus(String text) {
        statusLabel.setText(text);
    }

    // 重新开始游戏
    private void reset() {
        farmerPos = 0;
        wolfPos = 0;
        goatPos = 0;
        cabbagePos = 0;
        boatPos = 0;
        setButtonPosition(farmerButton, farmerPos);
        setButtonPosition(wolfButton, wolfPos);
        setButtonPosition(goatButton, goatPos);
        setButtonPosition(cabbageButton, cabbagePos);
        setButtonPosition(boatButton, boatPos);
        setStatus("农夫要把狼、羊、菜和自己运到对岸。但船太小，只能装下农夫和一样东西。");
    }

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

注意：本示例中没有对界面进行美化，只是简单的布局。如果需要美化界面，可以使用 CSS 样式表或 JavaFX 自带的皮肤。