lightdemo.java

西电科大的基于java面向对象教程

class Light{
	private boolean onOff;
	private int brightness=50;

	public void on(){
		onOff=true;
	}

	public void off(){
		onOff=false;
	}

	public void brighten(){
		setBrightness(getBrightness()+10);
	}

	public void dim(){
		setBrightness(getBrightness()-10);
	}

	private void setBrightness(int brightness){
		this.brightness=brightness;
	}

	private int getBrightness(){
		return brightness;
	}
}

public class LightDemo{
	public static void main(String[] args){
		Light l1=new Light();
		Light l2=new Light();

		l1.on();
		l2.off();
	}
}