class Shape								//定義父類 Shape
{
	public void draw()					//父類的draw()方法
    {
    		System.out.println("Draw a Shape");
	}
}

class Circle extends Shape				//定義子類Circle
{
	public void draw()					//覆蓋父類的draw()方法
	{
    		System.out.println("draw a Circle");
	}
}

class Ellipse extends Circle			//定義子類Ellipse
{
	public void draw()					//覆蓋父類的draw()方法
    {
    		System.out.println("draw a Ellipse");
	}
}

public class FInherit					//定義類FInherit
{
	public static void main(String args[])
	{
		Shape s= new Shape();			//動態綁定為類Shape對象
		Shape c = new Circle();			//動態綁定為類Circle對象
		Shape e = new Ellipse();		//動態綁定為類Ellipse對象

        s.draw();						//訪問父類方法
        c.draw();						//訪問一級子類方法
        e.draw();						//訪問二級子類方法        
	}
}