Here you can find the source of scale(final double[] a, double scale)
public static double[] scale(final double[] a, double scale)
//package com.java2s; /**//from ww w . java 2 s.c o m * Copyright 2014-2015 maochen.org * Author: Maochen.G contact@maochen.org * For the detail information about license, check the LICENSE.txt * <p> * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * <p> * 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 General Public License for more details. * <p> * You should have received a copy of the GNU General Public License * along with this program ; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, * MA 02111-1307 USA * <p> * Created by Maochen on 12/3/14. */ import java.util.Arrays; public class Main { public static double[] scale(final double[] a, double scale) { return Arrays.stream(a).parallel().map(x -> x * scale).toArray(); } }