finherit.java

java老师给的java例子很不错

class Shape								//定义父类 Shape
{
	public void draw()					//父类的draw()方法
    {
    		System.out.println("Draw a Shape");
	}
}

class Circle extends Shape				//定义子类Circle
{
	public void draw()					//覆盖父类的draw()方法
	{
    		System.out.println("draw a Circle");
	}
}

class Ellipse extends Circle			//定义子类Ellipse
{
	public void draw()					//覆盖父类的draw()方法
    {
    		System.out.println("draw a Ellipse");
	}
}

public class FInherit					//定义类FInherit
{
	public static void main(String args[])
	{
		Shape s= new Shape();			//动态绑定为类Shape对象
		Shape c = new Circle();			//动态绑定为类Circle对象
		Shape e = new Ellipse();		//动态绑定为类Ellipse对象

        s.draw();						//访问父类方法
        c.draw();						//访问一级子类方法
        e.draw();						//访问二级子类方法        
	}
}