java面向对象我基本特征

package org.zhq;

/**
 * @author zhq426
 *
 */
interface Shap {
	public void draw();
}

class Triangle  implements Shap{

	/* (non-Javadoc)
	 * @see org.zhq.Shap#draw()
	 */
	@Override
	public void draw() {
		// TODO Auto-generated method stub
		System.out.println("draw a triangle");
	}
}
class quadrilateral implements Shap{

	/* (non-Javadoc)
	 * @see org.zhq.Shap#draw()
	 */
	@Override
	public void draw() {
		// TODO Auto-generated method stub
		System.out.println("draw a quadrilateral");
	}
}

public class Test{
	public static void main(String[] args) {
		Triangle t=new Triangle();
		quadrilateral q=new quadrilateral();
		draw(t);
		draw(q);
	}
	public static void draw(Shap shap){
		shap.draw();
	}
}