返回iterable的大小；如果为null，则返回0

/** from N o w J a v a . c o m**/

/*******************************************************************************

 * Copyright (c) 2014 Open Door Logistics (www.opendoorlogistics.com)

 * All rights reserved. This program and the accompanying materials

 * are made available under the terms of the GNU Lesser Public License v3

 * which accompanies this distribution, and is available at http://www.gnu.org/licenses/lgpl.txt

 ******************************************************************************/

//package com.nowjava;


public class Main {

    /**

     * Return the size of the iterable or 0 if its null

     * @param iterable

     * @return

     */

    public static int size(Iterable<?> iterable) {

        if (iterable == null) {

            return 0;

        }

        int count = 0;