package class4_2_Observer;// Dr. Yoder. MSOE. 20 December 2016

public class VelocityObserver implements PositionObserver {
    private double oldPosition;

    @Override
    public void update(double positionMeters) {
        double  velocity = positionMeters - oldPosition;
        oldPosition = positionMeters;
        System.out.println("Velocity: "+velocity+" m/s");
    }
}