public class Demo
{
    public static void main(String[] args)
    {
        Circle circle1 = new Circle(2);
        Circle circle2 = new Circle(4);

	circle1.count = 99;

	System.out.println( circle1.radius );
	System.out.println( circle1.count );  
	System.out.println( circle2.radius );
	System.out.println( circle2.count ); 
	System.out.println();

	circle1.radius++; // Updates an instance variable

	System.out.println( circle1.radius );      // Changed
	System.out.println( circle1.count );  
	System.out.println( circle2.radius );      // Unchanged --> not shared
	System.out.println( circle2.count ); 
    }
}