Here you can find the source of sum(long... values)
public static final long sum(long... values)
//package com.java2s; /*************************************************************************** * Copyright (C) 2012 by H-Store Project * * Brown University * * Massachusetts Institute of Technology * * Yale University * * * * http://hstore.cs.brown.edu/ * * * * Permission is hereby granted, free of charge, to any person obtaining * * a copy of this software and associated documentation files (the * * "Software"), to deal in the Software without restriction, including * * without limitation the rights to use, copy, modify, merge, publish, * * distribute, sublicense, and/or sell copies of the Software, and to * * permit persons to whom the Software is furnished to do so, subject to * * the following conditions: * * * * The above copyright notice and this permission notice shall be * * included in all copies or substantial portions of the Software. * * * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR * * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, * * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * * OTHER DEALINGS IN THE SOFTWARE. * ***************************************************************************/ public class Main { /** Compute the sum of the given array */ public static final long sum(long... values) { long total = 0; for (long v : values) total += v;//from w w w .j a v a 2s . co m return (total); } /** Compute the sum of the given array */ public static final int sum(int... values) { int total = 0; for (int v : values) total += v; return (total); } }