private static void getAdjMtx(ArrayList<User> users){
		bigramCounterMap = new CounterMap<User, User>();
		for (int i = 0; i < users.size(); i++){
			for (int j = i + 1; j < users.size(); j++){
				User user1 = users.get(i);
				User user2 = users.get(j);
				double JaccardSim = getJaccardBtw2User(user1, user2);
				if (JaccardSim > SIM){
					numEdges += 1;
					//if (user1.u_id.compareTo(user2.u_id) <= 0) {
					bigramCounterMap.incrementCount(user1, user2, JaccardSim);
					//} else {
					bigramCounterMap.incrementCount(user2, user1, JaccardSim);
					//}
				}
			}
			if (i%1000 == 0)
				System.out.println(i);
		}
	}