Java Program to print the area of circle

import java.io.*;
import java.util.*;
public class Circle{
    Scanner scan=new Scanner(System.in);
    float r;
    double area=0;
    public void input()throws IOException{
        System.out.println("Enter the value of 'R': ");
        r=scan.nextFloat();
    }

    public void compute(){
        area=3.14*(r*r);
    }

    public void display(){
        System.out.println("Area of Circle: "+area);
        System.out.println("Value of R: "+r);
    }

    public static void main(String[]args)throws IOException{
        Circle obj=new Circle();
        obj.input();
        obj.compute();
        obj.display();
    }
}