有强迫症的罗小贱
2015-08-07 09:20
package com.imooc; import java.util.Scanner; public class Test { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.println("请输入圆的半径:"); double radius = input.nextDouble(); System.out.println("请输入矩形的长:"); double ll = input.nextDouble(); System.out.println("请输入矩形的宽:"); double ww = input.nextDouble(); Shape sha = new Rectangle(ll,ww); sha.Perimeter(); sha.area(); Shape sha1 = new Circle(radius); sha1.Perimeter(); sha1.area(); } }
package com.imooc; public abstract class Shape { public abstract void Perimeter(); public abstract void area(); }
package com.imooc; public class Rectangle extends Shape { public double l; public double w; public Rectangle(double length2,double wide2){ l = length2; w = wide2; if(l < 0){ System.out.println("你输入的长度有误,请重新输入"); } if(w < 0){ System.out.println("你输入的宽度有误吗,请重新输入"); } } public void Perimeter(){ double a = 2*(l + w); System.out.println("矩形的周长="+a); } public void area() { // TODO Auto-generated method stub double b = l * w; System.out.println("矩形的面积="+b); } }
package com.imooc; public class Circle extends Shape { double radius; public Circle(double r){ radius = r; if (radius < 0) { System.out.println("你输入的半径有误。请重新输入"); } } public void Perimeter(){ //double e = 3.14; double a = 2*radius*3.14; System.out.println("圆的周长="+a); } public void area() { // TODO Auto-generated method stub double b = 3.14 *radius*radius; System.out.println("圆的面积="+b); } }
Java入门第二季 升级版
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