circle and rectangle area using object in java

import java.util.Scanner;
class circle
{
    int r;
    double area()
    {
        return r*r;
    }
    double dia_circle()
    {
        return 2*r;
    }
}
class rectangle
{
    int l,w;
    rectangle(int x,int y)
    {
         l=x;
         w=y;
    }
    double area()
    {
        return l*w;
    }
}
public class Circle_rect_object {

     public static void main(String[] args) {
        Scanner virus=new Scanner(System.in);
        circle c1=new circle();
        circle c2=new circle();
        System.out.println("enter the radius for c1");
        c1.r=virus.nextInt();
        System.out.println("enter the radius for c2");
        c2.r=virus.nextInt();
        System.out.println("area of c1 is "+c1.area()+" area of c2 is "+c2.area());
        System.out.println("diameter of c1 "+c1.dia_circle()+" diameter of c2 "+c2.dia_circle());
        System.out.println("enter hight and width of rectangle");
        int x=virus.nextInt();
        int y=virus.nextInt();
        rectangle r=new rectangle(x,y);
        System.out.println("the area of rectangle is "+r.area());
       
    }
}