package pack2;

public class Fan {
	public final int SLOW = 1, MEDIUM = 2, FAST = 3;//慢速、中速、高速
	private int speed;	//速度
	private boolean on;	//状态（打开/关闭）
	private double radius;	//半径
	private String color;	//颜色
	
	public Fan() {
		speed = SLOW;
		radius = 5;
		color = "blue";
	}
	
	@Override	/**返回风扇描述的字符串*/
	public String toString() {
		if(on)	//如果风扇打开，返回速度、颜色、半径的字符串
			return "Speed: " + speed + "\nColor: " + color + "\nRadius: " + radius;
		else	//否则，输出关闭信息和颜色、半径
			return "fan is off\nColor: " + color + "\nRadius: " + radius;
	}
	
	/**返回速度*/
	public int getSpeed() {
		return speed;
	}

	/**设置速度*/
	public void setSpeed(int speed) {
		if(speed < SLOW)	
			this.speed = SLOW;
		else if(speed > FAST)
			this.speed = FAST;
		else this.speed = speed;
	}

	/**返回风扇状态（开/关）*/
	public boolean isOn() {
		return on;
	}

	/**设置风扇状态（开/关）*/
	public void setOn(boolean on) {
		this.on = on;
	}

	/**返回半径*/
	public double getRadius() {
		return radius;
	}

	/**设置半径*/
	public void setRadius(double radius) {
		this.radius = (radius > 0) ? radius : 0;
	}

	/**返回颜色*/
	public String getColor() {
		return color;
	}

	/**设置颜色*/
	public void setColor(String color) {
		this.color = color;
	}

//————————————————————————————————————————————————————————————
	public static void main(String[] args) {
		Fan fan1 = new Fan();
		fan1.setOn(true);
		fan1.setSpeed(fan1.FAST);
		fan1.setRadius(10);
		fan1.setColor("yellow");
		System.out.println("Fan1: \n" + fan1.toString());
		
		Fan fan2 = new Fan();
		fan2.setSpeed(fan2.MEDIUM);
		System.out.println("\nFan2: \n" + fan2.toString());
		
	}

}