Program to Calculate Area of Circle using Classes and Objects

//Program to Calculate Area of Circle using Classes and Objects
//Developed by Ahlam Ansari

import java.util.*;
import java.io.*;

class Area
{
int radius;
float circleArea;
final float pi=3.14f;
void inputData()
{
    Scanner scan = new Scanner( System.in );
    System.out.println( "Enter the RADIUS of the circle");
    radius=scan.nextInt();
}

void calculateArea()
{
    circleArea=pi*(float)Math.pow(radius,2);
}

void displayArea()
{
    System.out.println("The Area of Circle is "+ circleArea);
}
}

class MainArea
{
    public static void main (String ahlam[])
    {
        Area a= new Area();
        a.inputData();
        a.calculateArea();
        a.displayArea();
    }
}

/*

C:\Users\Ahlam\Google Drive\OOPM\Programs>javac MainArea.java

C:\Users\Ahlam\Google Drive\OOPM\Programs>java MainArea
Enter the RADIUS of the circle
2
The Area of Circle is 12.56
*/