Here you can find the source of toArray(final Collection> c)
public final static Object[] toArray(final Collection<?> c)
//package com.java2s; /**//from w ww .j av a 2 s .c om * The contents of this file are subject to the Regenstrief Public License * Version 1.0 (the "License"); you may not use this file except in compliance with the License. * Please contact Regenstrief Institute if you would like to obtain a copy of the license. * * Software distributed under the License is distributed on an "AS IS" * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the * License for the specific language governing rights and limitations * under the License. * * Copyright (C) Regenstrief Institute. All Rights Reserved. */ import java.util.*; public class Main { public final static Object[] toArray(final Collection<?> c) { return c == null ? null : c.toArray(); } }