/*
        Calculate Rectangle Perimeter using Java Example
        This Calculate Rectangle Perimeter using Java Example shows how to calculate
        perimeter of Rectangle using it's length and width.
*/

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class CalculateRectPerimeter
{

    public static void main(String[] args)
    {
        int width = 0;
        int length = 0;
        try
            {
                //read the length from console
                BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
                System.out.println("Please enter length of a rectangle");
                length = Integer.parseInt(br.readLine());
                //read the width from console
                System.out.println("Please enter width of a rectangle");
                width = Integer.parseInt(br.readLine());
            }
        //if invalid value was entered
        catch(NumberFormatException ne)
            {
                System.out.println("Invalid value" + ne);
                System.exit(0);
            }
        catch(IOException ioe)
            {
                System.out.println("IO Error :" + ioe);
                System.exit(0);
            }
        /*
         * Perimeter of a rectangle is
         * 2 * (length + width)
        */
        int perimeter = 2 * (length + width);
        System.out.println("Perimeter of a rectangle is " + perimeter);
    }

}

/*
Output of Calculate Rectangle Perimeter using Java Example would be
Please enter length of a rectangle
10
Please enter width of a rectangle
15
Perimeter of a rectangle is 50
*/