Here you can find the source of average(long[] vals)
public static double average(long[] vals)
//package com.java2s; /*/*from w w w .j a v a2 s. c o m*/ * Copyright (c) 2007-2012 The Broad Institute, Inc. * SOFTWARE COPYRIGHT NOTICE * This software and its documentation are the copyright of the Broad Institute, Inc. All rights are reserved. * * This software is supplied without any warranty or guaranteed support whatsoever. The Broad Institute is not responsible for its use, misuse, or functionality. * * This software is licensed under the terms of the GNU Lesser General Public License (LGPL), * Version 2.1 which is available at http://www.opensource.org/licenses/lgpl-2.1.php. */ public class Main { public static double average(long[] vals) { long sum = 0; double n = (double) vals.length; for (Long i : vals) sum += ((double) i); return sum / n; } }