shape v4

/*
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 */
package shape;  

/**
 *
 * @author S346680274
 *///import java.lang.Math.*;
import java.util.Scanner;
import java.util.InputMismatchException;

public class Shape {
    double area;
    double perimeter;
    double length;
    double width;
    double side1;
    double side2;
    double side3;
    
        public double checkValue(String statement){
        System.out.print(statement);
        Scanner input = new Scanner(System.in);
        double num1;
        while (true){
            try{
                num1=input.nextDouble();
                if (num1>0){
                    break;
                }
                else{
                    System.out.print("Please enter a positive number!");
                }
            }
            catch (InputMismatchException err){
                input.next();
                System.out.print("The value entered is not a number. Please try again."+statement);
            }
        }
        return num1;
    }
        public void userInput(){
        Scanner input = new Scanner(System.in);
        System.out.println("Enter the dimensions");
        this.width=checkValue("width: ");
        this.length=checkValue("length: ");    
    }
      


    public double area(){
        return (this.width*this.length);
    };
    
   public double perimeter(){
       return (2*(this.width+this.length));
   }
  
        public static void CallShape(){
                 while (true){
            System.out.println("\nThese are the shapes available:\n a.Circle\n b.Rectangle\n c.Square \n d.Triangle.");
            System.out.println("\nWhich shape would you like to find the area and perimeter of?");
            String ans=input.next();
            switch (ans){
                case ("a"):
                    System.out.println("\nCalculating the area and the circumference of the circle...");
                    Shape c = new Circle();
                    c.userInput();
                    System.out.println("\nThis is the area of the circle with the dimensions you entered:"+c.area());
                    System.out.println("\nThis is the circumference of the circle with the dimensions you entered:"+c.perimeter());
                    break;
                case ("b"):
                        System.out.println("\nCalculating the area and perimeter of the rectangle... ");
                        Shape r = new Shape();
                        r.userInput();
                        System.out.println("\nThis is the area of the rectangle with the dimensions you entered:"+r.area());
                        System.out.println("\nThis is the circumference of the rectangle with the dimensions you entered:"+r.perimeter());
                        break;
                case ("c"):
                        System.out.println("\nCalculating the area and perimeter of the Sqaure..");
                        Shape s = new Square();
                        s.userInput();
                        System.out.println("\nThis is the area of the square with the dimensions you entered:"+s.area());
                        System.out.println("\nThis is the circumference of the square with the dimensions you entered:"+s.perimeter());
                        break;
                case ("d"):
                        System.out.println("\nCalculating the area and perimeter of a Triangle.. ");
                        Shape t = new Triangle();
                        t.userInput();
                        System.out.println("\nThis is the area of the triangle with the dimensions you entered:"+t.area());
                        System.out.println("\nThis is the circumference of the triangle with the dimensions you entered:"+t.perimeter());
                        break;
                default:
                        System.out.println("\nInvalid Option :(");
                        continue;
                                   
            }
            }
            
            
   
    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here 
         Scanner input = new Scanner(System.in);
         System.out.println("WELCOME! This is a program to calculate the area and perimeter of 2D shapes with any dimensions that you enter.");
         System.out.println("*NOTE*: DO ENTER ALL THE DIMENSIONS IN THE SAME UNITS. THIS PROGRAM WILL ONLY CALCULATE THE FINAL AREA AND PERIMETER. IT WILL NOT CONVERT ANY UNITS FOR CALCULATING PURPOSES.");
         CallShape();
         System.out.println("\nWould you like to find the area and perimeter of another shape?");
         String choice=input.next();
         if (choice.equalsIgnoreCase("yes") || choice.equalsIgnoreCase("y") || choice.equalsIgnoreCase("Y") || choice.equalsIgnoreCase("YES")){
                CallShape();
            }
        else {
                System.out.println("\nDo come again!");
         }
         

         
         
    }
    
}}