Here you can find the source of iterableToCollection(Iterable c, Collection
private static <T> void iterableToCollection(Iterable<? extends T> c, Collection<T> list)
//package com.java2s; /**// w w w.j av a 2 s. com * Copyright (c) 1997-2013, www.tinygroup.org (luo_guo@icloud.com). * * Licensed under the GPL, Version 3.0 (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.gnu.org/licenses/gpl.html * * 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.*; public class Main { private static <T> void iterableToCollection(Iterable<? extends T> c, Collection<T> list) { for (T element : c) { list.add(element); } } }