Calculate Rectangle Perimeter using Java

/*
	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
*/