java--接口实现的操作实例

/*时间：2012-10-09作者：烟大程序目的：以接口实现类的多重继承，加深对继承的理解*/public class Day1009_Implement{public static void main(String[] args){Day1009_Implement2 D=new Day1009_Implement2(3,5,2);System.out.println(D.getArea());System.out.println(D.getColor());}}interface area{//定义面积接口final int f1=20;final int f2=30;abstract public int getArea();//定义的抽象方法}interface color//定义颜色接口{final String s1="red";final String s2="green";final String s3="blue";abstract public String getColor();}class Day1009_Implement2 implements area,color//实现接口{int k1,k2;String c;public Day1009_Implement2(int v1,int v2,int v3)//构造函数{k1=f1+v1;k2=f2+v2;switch(v3){case 1:c=s1;break;case 2:c=s2;break;case 3:c=s3;break;}}public String getColor() {//明确定义获取颜色的方法// TODO Auto-generated method stubreturn c;}public int getArea() {//明确定义获取面积的方法// TODO Auto-generated method stubreturn k1*k2;}}