Here you can find the source of getLongListAvg(Collection
public static Long getLongListAvg(Collection<Long> c)
//package com.java2s; import java.util.Collection; public class Main { public static Long getLongListAvg(Collection<Long> c) { return getLongListSum(c) / c.size(); }/*from www . j a v a 2 s . c o m*/ public static Long getLongListSum(Collection<Long> c) { Long sum = 0l; for (Long i : c) { sum += i; } return sum; } }