• Class-based OOPL with inheritance
• A class is a template that defines how an object will look and behave once instantiated

public class Point {
      private float x_;
      private float y_;

      public Point (float xval,
               float yval)
          { x_=xval; y_=yval; }

      public float distanceFrom
                  (Point refpt)
                  {
      ...
   }
}