1  import java.util.Comparator;
  2  
  3  public class GeometricObjectComparator
  4      implements Comparator<GeometricObject>, java.io.Serializable {
  5    public int compare(GeometricObject o1, GeometricObject o2) {
  6      return o1.getArea() > o2.getArea() ? 
  7      	1 : o1.getArea() == o2.getArea() ? 0 : -1;
  8    }
  9  }