circle.java

疯狂Java讲义_源码(含Java设计模式CHM

/**
 * Description:
 * <br/>Copyright (C), 2005-2008, Yeeku.H.Lee
 * <br/>This program is protected by copyright laws.
 * <br/>Program Name:
 * <br/>Date:
 * @author  Yeeku.H.Lee [e-mail]
 * @version  1.0
 */
public class Circle extends Shape
{
	private double radius;

	public Circle(String color , double radius)
	{
		super(color);
		this.radius = radius;
	}

	public void setRadius(double radius)
	{
		this.radius = radius;
	}
	//重写Shape类的的计算周长的抽象方法
	public double calPerimeter()
	{
		return 2 * Math.PI * radius;
	}
	//重写Shape类的的返回形状的抽象方法
	public String getType()
	{
		return getColor() + "圆形";
	}
	public static void main(String[] args)
	{
		Shape s1 = new Triangle("黑色" , 3 , 4, 5);
		Shape s2 = new Circle("黄色" , 3);
		System.out.println(s1.getType());
		System.out.println(s1.calPerimeter());
		System.out.println(s2.getType());
		System.out.println(s2.calPerimeter());

	}
}