import java.awt.*;
import java.util.*;

public class PointComparatorExample {
    public static void main(String[] args) {
        Point[] points = {
            new Point(4, -2),
            new Point(3, 9),
            new Point(-1, 15),
            new Point(3, 7)
        };

        Arrays.sort(points, new PointComparator());
        for (Point p : points) {
            System.out.println("(" + p.x + ", " + p.y + ")");
        }
        System.out.println();

        Arrays.sort(points, Collections.reverseOrder(
                new PointComparator()));
        for (Point p : points) {
            System.out.println("(" + p.x + ", " + p.y + ")");
        }
    }
}