下面时我写的程序，本身没有问题的，请改进一下

Question

public class Demo{

public static void main(String[] args){

Rectangle re=new Rectangle();

re.seta(2.5);

re.setb(2.8);

re.comput();

Circle ci=new Circle();

ci.seta(2.5);

ci.setb(3.5);

ci.comput();

}

}

abstract class Shapc{

private double a;

private double b;

public double geta(){

return a;

}

public void seta(double a){

this.a=a;

}

public double getb(){

return b;

} 

public void setb(double b){

this.b=b;

}

public abstract void comput();

}

class Rectangle extends Shapc{

public void comput(){

double rectArea=geta()*getb();

double rectPerimeter=(geta()+getb())*2;

System.out.println("矩形的周长:"+rectPerimeter+",矩形的面积:"+rectArea);

}

}

class Circle extends Shapc{

public void comput(){

double cirArea=geta()*getb()*getb();

double cirPerimeter=geta()*getb()*2;

System.out.println("圆形的周长:"+cirPerimeter+",圆形的面积:"+cirArea);

}

}

Answer 1

改进是指？代码长度？还是变量规范？