模拟实现电风扇，可以调3档速度（慢速、中速、快速）；开关按钮；定时吹风；描述风扇的扇叶大小、颜色等。 设计Fan类，属性包括：3个常量SLOW（1）、MEDIUM（2）、FAST（3）代表风扇的速度；1个int属性speed指定速度，默认值为SLOW；1个boolean属性on指定开关机，默认值false；1个double属性radius指定风扇扇叶大小；1个String属性color指定扇叶颜色，默认值为blue。方法包括这些属性的访问器、构造函数、重写Object类的toString()和equals()方法等。运行测试代码： public static void main(String[] args) { ​ Fan1 fan1 = new Fan1(); ​ fan1.setSpeed(Fan1.FAST); ​ fan1.setRadius(10); ​ fan1.setColor("yellow"); ​ fan1.setOn(true); ​ System.out.println(fan1.toString()); } 版本2： 修改版本1中Fan类，让其继承Pane类，并且把color属性设置为Color类型，默认属性为red。随机产生radius，取值范围为1-5；随机产生颜色，取值范围为red、blue、yellow、green、orange；根据color、radius属性值绘制风扇。运行如下图： 版本3： 让版本2中的风扇转起来。创建一个FanControl类包含以下内容：Start、Stop、Reverse按钮，用于开启、关闭、反转控制；一个滚动条控制速度。运行示例如下：

好的，我已经了解了您的问题。以下是代码实现：

版本1：

public class Fan1 {

    final static int SLOW = 1;
    final static int MEDIUM = 2;
    final static int FAST = 3;
    private int speed = SLOW;
    private boolean on = false;
    private double radius = 5;
    private String color = "blue";

    public Fan1() {

    }

    public int getSpeed() {
        return speed;
    }

    public void setSpeed(int speed) {
        this.speed = speed;
    }

    public boolean isOn() {
        return on;
    }

    public void setOn(boolean on) {
        this.on = on;
    }

    public double getRadius() {
        return radius;
    }

    public void setRadius(double radius) {
        this.radius = radius;
    }

    public String getColor() {
        return color;
    }

    public void setColor(String color) {
        this.color = color;
    }

    @Override
    public String toString() {
        if (on) {
            return "Fan speed: " + speed + ", color: " + color + ", radius: " + radius;
        } else {
            return "The fan is off, color: " + color + ", radius: " + radius;
        }
    }

    @Override
    public boolean equals(Object obj) {
        if (obj instanceof Fan1) {
            Fan1 fan = (Fan1) obj;
            return fan.speed == speed && fan.on == on && fan.radius == radius && fan.color.equals(color);
        }
        return false;
    }
}

版本2：

import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.scene.shape.Arc;
import javafx.scene.shape.ArcType;
import javafx.scene.shape.Circle;
import javafx.scene.shape.Polygon;

import java.util.Random;

public class Fan2 extends Pane {

    final static int SLOW = 1;
    final static int MEDIUM = 2;
    final static int FAST = 3;
    private int speed = SLOW;
    private boolean on = false;
    private double radius;
    private Color color;

    public Fan2() {
        this.radius = new Random().nextInt(5) + 1;
        int colorIndex = new Random().nextInt(5);
        switch (colorIndex) {
            case 0:
                this.color = Color.RED;
                break;
            case 1:
                this.color = Color.BLUE;
                break;
            case 2:
                this.color = Color.YELLOW;
                break;
            case 3:
                this.color = Color.GREEN;
                break;
            case 4:
                this.color = Color.ORANGE;
                break;
        }
        draw();
    }

    public int getSpeed() {
        return speed;
    }

    public void setSpeed(int speed) {
        this.speed = speed;
        draw();
    }

    public boolean isOn() {
        return on;
    }

    public void setOn(boolean on) {
        this.on = on;
        draw();
    }

    public double getRadius() {
        return radius;
    }

    public void setRadius(double radius) {
        this.radius = radius;
        draw();
    }

    public Color getColor() {
        return color;
    }

    public void setColor(Color color) {
        this.color = color;
        draw();
    }

    private void draw() {
        getChildren().clear();
        if (on) {
            Circle circle = new Circle(getWidth() / 2, getHeight() / 2, radius * 10, Color.WHITE);
            circle.setStroke(color);
            circle.setStrokeWidth(5);
            getChildren().add(circle);

            double angle = 0;
            for (int i = 0; i < 4; i++) {
                Polygon blade = new Polygon();
                blade.getPoints().addAll(new Double[]{
                        getWidth() / 2, getHeight() / 2,
                        getWidth() / 2 + Math.cos(Math.toRadians(angle + 30)) * radius * 10, getHeight() / 2 + Math.sin(Math.toRadians(angle + 30)) * radius * 10,
                        getWidth() / 2 + Math.cos(Math.toRadians(angle + 150)) * radius * 10, getHeight() / 2 + Math.sin(Math.toRadians(angle + 150)) * radius * 10
                });
                blade.setFill(color);
                getChildren().add(blade);
                angle += 90;
            }
        } else {
            Circle circle = new Circle(getWidth() / 2, getHeight() / 2, radius * 10, Color.WHITE);
            circle.setStroke(color);
            circle.setStrokeWidth(5);
            getChildren().add(circle);
        }
    }
}

版本3：

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

public class FanControl extends Application {

    private Fan2 fan = new Fan2();

    @Override
    public void start(Stage primaryStage) throws Exception {
        BorderPane pane = new BorderPane();
        pane.setCenter(fan);

        Button startBtn = new Button("Start");
        Button stopBtn = new Button("Stop");
        Button reverseBtn = new Button("Reverse");

        startBtn.setOnAction(e -> {
            fan.setOn(true);
        });

        stopBtn.setOnAction(e -> {
            fan.setOn(false);
        });

        reverseBtn.setOnAction(e -> {
            fan.setSpeed(4 - fan.getSpeed());
        });

        Slider speedSlider = new Slider();
        speedSlider.setMin(1);
        speedSlider.setMax(3);
        speedSlider.setValue(1);
        speedSlider.valueProperty().addListener((ov, old_val, new_val) -> {
            fan.setSpeed(new_val.intValue());
        });

        HBox buttonBox = new HBox(10);
        buttonBox.getChildren().addAll(startBtn, stopBtn, reverseBtn);

        VBox controlBox = new VBox(10);
        controlBox.getChildren().addAll(buttonBox, speedSlider);

        pane.setBottom(controlBox);

        Scene scene = new Scene(pane, 400, 400);
        primaryStage.setScene(scene);
        primaryStage.setTitle("Fan Control");
        primaryStage.show();
    }

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

希望能解决您的问题。