用java编写一个会转动的风扇,风扇有一根柱子，五片扇叶,

以下是一个简单的Java风扇类，其中包括了风扇的转动功能。

import java.awt.Color;
import java.awt.Graphics;

import javax.swing.JPanel;

public class Fan extends JPanel implements Runnable {

    private static final long serialVersionUID = 1L;

    private int angle = 0;
    private int speed = 5;
    private int x = 150;
    private int y = 150;
    private int radius = 100;
    private int bladeCount = 5;
    private Color bladeColor = Color.BLUE;

    public Fan() {
        Thread thread = new Thread(this);
        thread.start();
    }

    @Override
    public void run() {
        while (true) {
            angle += speed;
            repaint();
            try {
                Thread.sleep(50);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        g.setColor(Color.WHITE);
        g.fillRect(0, 0, getWidth(), getHeight());

        g.setColor(Color.BLACK);
        g.drawOval(x - radius, y - radius, radius * 2, radius * 2);

        for (int i = 0; i < bladeCount; i++) {
            int bladeAngle = angle + i * (360 / bladeCount);
            int bladeX = (int) (x + radius * Math.cos(Math.toRadians(bladeAngle)));
            int bladeY = (int) (y + radius * Math.sin(Math.toRadians(bladeAngle)));

            g.setColor(bladeColor);
            g.drawLine(x, y, bladeX, bladeY);
        }
    }

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

    public void setBladeCount(int bladeCount) {
        this.bladeCount = bladeCount;
    }

    public void setBladeColor(Color bladeColor) {
        this.bladeColor = bladeColor;
    }
}

使用方法：

public class Main {

    public static void main(String[] args) {
        JFrame frame = new JFrame();
        frame.setSize(400, 400);
        frame.setLocationRelativeTo(null);

        Fan fan = new Fan();
        fan.setSpeed(10);
        fan.setBladeCount(5);
        fan.setBladeColor(Color.RED);

        frame.add(fan);
        frame.setVisible(true);
    }
}

这个类继承自 `JPanel`，并且实现了 `Runnable` 接口，其中的 `run()` 方法用来控制风扇的转动。使用 `paintComponent()` 方法来绘制风扇，可以通过 `setSpeed()`、`setBladeCount()` 和 `setBladeColor()` 方法来设置风扇的转速、叶片数和颜色。在 `main()` 方法中创建一个 `Fan` 对象，并设置相关属性，然后将其添加到 `JFrame` 中即可。