java大神请指教

Question

package com.imooc;import java.util.Scanner;import java.lang.Math;public abstract class Shape {//父类shapedouble a;double b;double r;public abstract void c();public abstract void s();public void Shape(){ Scanner input1=new Scanner(System.in); Scanner input2=new Scanner(System.in); System.out.print("请输入长a"); double a1=input1.nextDouble(); System.out.println(); System.out.print("请输入宽b"); double b1=input2.nextDouble(); System.out.println(); Scanner input3=new Scanner(System.in); System.out.print("请输入圆的半径"); double r=input3.nextDouble();}}2.子类Circlepackage com.imooc;import java.util.Scanner;public class Circle extends Shape { @Override public void c() { // TODO Auto-generated method stub double r=super.r;double c=2*Math.PI*r;System.out.println("圆的周长为"+c); } @Override public void s() {double r=super.r;double s=Math.PI*r*r;System.out.println("圆的面积为"+s); }}3.子类Retanglepackage com.imooc;import java.util.Scanner;public class Retangle extends Shape { @Override public void c() { // TODO Auto-generated method stub double a=super.a; double b=super.b; double c=2*(a+b); System.out.println("长方形的周长为"+c); } @Override public void s() { // TODO Auto-generated method stub // TODO Auto-generated method stub double a=super.a; double b=super.b; double s=a*b; System.out.println("长方形的面积为"+s); }}4.测试类Initalpackage com.imooc;public class Iniatal { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub Shape h1=new Retangle(); h1.c(); h1.s(); Shape h2=new Circle(); h2.c(); h2.s(); }}结果得到的怎么是全零，我不是做了外界输入参数的值吗，请问问题出在哪里？

Answer 1

1.父类shape的shape方法应该是构造方法，没有void；

2.键盘得到的值应该直接赋给全局变量

Answer 2

多谢，问题解决部分，另外请问我怎么实现在输入a,b,r后依次得到长方形的周长，面积以及圆的周长，面积。我输入abr后得到了长方形的周长面积，系统又让我输入一次abr才能得到圆的周长面积，怎么把后面一次输入去掉？