华恩JAVA班第22天

梦里梦外; 2022-06-14 02:59 123阅读 0赞

[华恩][Link 1]JAVA班第22天

package com.zjj;  
  
public abstract class Shape \{  
 private String name;  
   
 public Shape(String name)\{  
  this.name = name;  
 \}  
   
 public abstract double Area();  
 public abstract double Perimeter();  
\}

package com.zjj;  
  
public class Triangle extends Shape\{  
 static double sqrt3 = 1.73;  
 private double length;  
 public Triangle(String name,double length)\{  
  super(name);  
  this.length = length;  
 \}  
 @Override  
 public double Area() \{  
  // TODO Auto-generated methodstub  
  returnsqrt3\*length\*length/4;  
 \}  
 @Override  
 public double Perimeter() \{  
  // TODO Auto-generated methodstub  
  return 3\*length;  
 \}  
\}

package com.zjj;  
  
public class Square extends Shape\{  
 private double length;

public Square(String name, double length)\{  
  super(name);  
  this.length = length;  
 \}

@Override  
 public double Area() \{  
  // TODO Auto-generated methodstub  
  return length\*length;  
 \}

@Override  
 public double Perimeter() \{  
  // TODO Auto-generated methodstub  
  return 4\*length;  
 \}  
\}

package com.zjj;  
  
public class Rectangle extends Shape\{  
 private double length;  
 private double wide;  
 public Rectangle(String name, double length,double wide) \{  
  super(name);  
  this.length = length;  
  this.wide = wide;  
 \}  
 @Override  
 public double Area() \{  
  // TODO Auto-generated methodstub  
  return length\*wide;  
 \}  
 @Override  
 public double Perimeter() \{  
  // TODO Auto-generated methodstub  
  return 2\*(length+wide);  
 \}  
\}

package com.zjj;  
  
public class Circular extends Shape\{  
 static double PI = 3.14;  
 private double radius;  
 public Circular(String name, double radius)\{  
  super(name);  
  this.radius = radius;  
 \}  
 @Override  
 public double Area() \{  
  // TODO Auto-generated methodstub  
  return PI\*radius\*radius;  
 \}  
 @Override  
 public double Perimeter() \{  
  // TODO Auto-generated methodstub  
  return 2\*PI\*radius;  
 \}  
\}

package com.zjj;  
import java.util.Scanner;  
  
public class Test \{  
 public static void main(String\[\] args) \{  
  Scanner in = newScanner(System.in);  
  System.out.println("请输入要计算的图形名字");  
  while(true)\{  
   String a =in.next();  
   if(a.equals("正三角形"))\{  
    System.out.println("请输入"+a+"的边长：");  
    doublelength = in.nextDouble();  
    Triangletriangle = new Triangle(a,length);  
    System.out.println(a+"的面积为："+triangle.Area()+"\\n"+a+"的周长为："+triangle.Perimeter());  
    break;  
   \}elseif(a.equals("正方形"))\{  
    System.out.println("请输入正方形的边长：");  
    doublelength = in.nextDouble();  
    Squaresquare = new Square("正方形",length);  
    System.out.println("正方形的面积为："+square.Area()+"\\n"+"正方形的周长为："+square.Perimeter());  
    break;  
   \}elseif(a.equals("矩形"))\{  
    System.out.println("请输入矩形的边长：");  
    doublelength = in.nextDouble();  
    System.out.println("请输入矩形的宽：");  
    doublewide = in.nextDouble();  
    Rectanglerectangle = new Rectangle("矩形",length,wide);  
    System.out.println("矩形的面积为："+rectangle.Area()+"\\n"+"矩形的周长为："+rectangle.Perimeter());  
    break;  
   \}elseif(a.equals("circular"))\{  
    System.out.println("请输入圆形的半径：");  
    doubleradius = in.nextDouble();  
    Circularcircular = new Circular("圆形",radius);  
    System.out.println("圆形的面积为："+circular.Area()+"\\n"+"圆形的周长为："+circular.Perimeter());  
    break;  
   \}else\{  
    System.out.println("暂不支持其他图形计算，请重新输入");  
   \}  
  \}  
 \}  
\}

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