Here you can find the source of average(Collection
private static long average(Collection<Long> values)
//package com.java2s; /*//from ww w . j a v a 2s .c o m * Copyright 2011-2015 B2i Healthcare Pte Ltd, http://b2i.sg * * 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. */ import java.util.Collection; public class Main { private static long average(Collection<Long> values) { long avg = 0; for (Long value : values) { avg += value; } return avg / values.size(); } }