继承与多态练习

public class Main{
public static void main(String args[]){
double all;
Board board=new Board();
QingBoard qingBoard=new QingBoard();
board=qingBoard;
LvBoard lvBoard=new LvBoard();
ChiBoard chiBoard=new ChiBoard();
qingBoard=chiBoard;
ZiBoard ziBoard=new ZiBoard();
LanBoard lanBoard=new LanBoard();
ChengBoard chengBoard=new ChengBoard();
HuangBoard huangBoard=new HuangBoard();
all=/*求青板的时候用了多态*/board.getsum()+/*求赤板的时候用了多态*/qingBoard.getsum()+lvBoard.getLsum()+ziBoard.getZsum()+lanBoard.getLasum()+chengBoard.getChsum()+huangBoard.getHsum();
System.out.println(all);
}
}
class Board{
int s=200;//正面和侧面
int b=10;//每一个边的面积
int sum=40;//所有边的面积
double getsum(){return s+sum;}
}
class QingBoard extends Board{
int s1=s/4;
double sum1=sum/4+1.414*10;
double getsum(){
return s+sum1;
}
}
class LvBoard extends Board{
int s1=s/4;
double sum1=sum/4+1.414*10;
double getLsum(){
return s+sum1;
}
}
class ChiBoard extends QingBoard{
double sum2=sum1/2;
int s2=s1/4;
double getsum(){
return s2+sum2;
}
}
class ZiBoard extends QingBoard{
double sum2=sum1/2;
int s2=s1/4;
double getZsum(){
return s2+sum2;
}
}
class LanBoard extends Board{
int s3=s/8;
double sum3=1.414*10;
double getLasum(){
return s3+sum3;
}
}
class ChengBoard extends Board{
int s4=s/8;
double sum4=1.414*5+10;
double getChsum(){
return s4+sum4;
}
}
class HuangBoard extends ZiBoard{
int s5=2*s2;
double sum5=10+1.414*5;
double getHsum(){
return s5+sum5;
}
}
本文来自博客园,作者:{李浩正},转载请注明原文链接:https://www.cnblogs.com/hzzzz/p/16267787.html