Java Source - Calculate Rectangle Perimeter.

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  /*
 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);
    }
}

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/*
 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
 */

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