设计一个名为Fan的类模拟风扇.

public class Fan { private final int SLOW = 1; private final int MEDIUM = 1; private final int FAST = 1; private int speed = SLOW; private boolean on = false; private double radius = 5; private String color = "blue"; 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; } public Fan(){}; public Fan(int speed,boolean on,double radius,String color){ this。speed = speed; this。on = on; this。radius = radius; this。color = color; } @Override public String toString() { if(on==true){ return "该风扇的速度为：" + speed +"；颜色是："+color+"；半径是："+radius; }else{ return "fan is off;"+"该风扇的颜色是："+color+"；半径是："+radius; } } }uml图自己画,呵呵