/** Randomly sets K temporary cluster centers */
private static void setRandomCenters() {
centers = new ArrayList<Point>();
int rand;
for (int i = 0; i < K; ++i) {
do {
rand = (int) (Math.random() * points.size());
} while (centers.contains(points.get(rand)));
centers.add(points.get(rand));
clusters.get(i).addCenterPoint(points.get(rand));
}
for (Point p : centers) System.out.println(p);
}
