Here you can find the source of sum(double... values)
public static double sum(double... values)
//package com.java2s; /******************************************************************************* * Copyright 2009, 2010 Lars Grammel /* ww w. j av a 2 s.c om*/ * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. *******************************************************************************/ public class Main { public static double sum(double... values) { assert values != null; double sum = 0d; for (double value : values) { sum += value; } return sum; } }