An Example in Java Programming

Java Program Example

The example Java program is about how to calculate the area of a rectangle.

Calculate Rectangle Area using Java Example

This Calculate Rectangle Area using Java Example shows how to calculate area of Rectangle using it's length and width.

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

public class CalculateRectArea {

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);

}

/*

* Area of a rectangle is

* length * width

*/

int area = length * width;

System.out.println("Area of a rectangle is " + area);

}

}

/*

Output of Calculate Rectangle Area using Java Example would be

Please enter length of a rectangle

10

Please enter width of a rectangle

15

Area of a rectangle is 150

*/

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