class Circle
{
  private double rad;

  public Circle(double r)
  {
    rad = r;
  }

  public void setRadius(double r)
  {
    rad = r;
  }

  public double radius()
  {
    return rad;
  }
}

public class FinalTest
{
  private static final Circle wheel = new Circle(5.0);

  public static void main(String args[])
  {
    System.out.println("Radius of wheel is " +
                        wheel.radius());
    wheel.setRadius(7.4);
    System.out.println("Radius of wheel is now " +
                        wheel.radius());
  }
}