Here you can find the source of computeDistance(long[] a, long[] b)
public static long computeDistance(long[] a, long[] b)
//package com.java2s; /*/*from w w w. ja v a 2s. co m*/ This file is part of PH-Tree: A multi-dimensional indexing and storage structure. Copyright (C) 2011-2015 Eidgen?ssische Technische Hochschule Z?rich (ETH Zurich) Institute for Information Systems GlobIS Group Bogdan Vancea, Tilmann Zaeschke zaeschke@inf.ethz.ch or zoodb@gmx.de This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ public class Main { public static long computeDistance(long[] a, long[] b) { long dist = 0; for (int i = 0; i < a.length; i++) { dist += (a[i] - b[i]) * (a[i] - b[i]); } return (long) Math.sqrt(dist) + 1; } }