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：

好的，根据您的需求，修改的Fan类如下：

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

import java.util.Random;

public class Fan extends Pane {
    private final int SLOW = 1;
    private final int MEDIUM = 2;
    private final int FAST = 3;
    private int speed = SLOW;
    private boolean on = false;
    private double radius;
    private Color color;

    public Fan() {
        setRadius();
        setColor();
    }

    public void setRadius() {
        Random random = new Random();
        this.radius = random.nextDouble() * 4 + 1;
    }

    public void setColor() {
        Random random = new Random();
        Color[] colors = {Color.RED, Color.BLUE, Color.YELLOW, Color.GREEN, Color.ORANGE};
        this.color = colors[random.nextInt(colors.length)];
    }

    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 Color getColor() {
        return color;
    }

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

    public void drawFan() {
        getChildren().clear();
        if (on) {
            double centerX = getWidth() / 2.0;
            double centerY = getHeight() / 2.0;
            Circle circle = new Circle(centerX, centerY, radius * 40, Color.TRANSPARENT);
            circle.setStroke(Color.BLACK);
            circle.setStrokeWidth(2);
            getChildren().add(circle);
            for (int i = 0; i < 4; i++) {
                Arc arc = new Arc(centerX, centerY, radius * 40, radius * 40, i * 90 + 30, 30);
                arc.setFill(color);
                arc.setType(Shape.Type.ROUND);
                getChildren().add(arc);
            }
        } else {
            Circle circle = new Circle(getWidth() / 2.0, getHeight() / 2.0, radius * 40, Color.TRANSPARENT);
            circle.setStroke(Color.BLACK);
            circle.setStrokeWidth(2);
            getChildren().add(circle);
        }
    }
}

以上代码实现了继承Pane类，重写了drawFan方法来根据属性值绘制风扇，并且添加了随机产生radius和color属性值的方法。您可以在其他类中实例化Fan类并调用其drawFan方法来绘制风扇。