Returns the number of elements the iterable contains. - Java Collection Framework

Java examples for Collection Framework:Iterable

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Description

Returns the number of elements the iterable contains.

Demo Code

/*// w  w  w  . j  av a 2  s  .c o  m
 * Copyright (C) 2007-2014 Crafter Software Corporation.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
//package com.java2s;

import java.util.Iterator;

public class Main {
    /**
     * Returns the number of elements the iterable contains.
     *
     * @param iterable the iterable
     * @return the element count of the iterable
     */
    public static <T> int count(Iterable<T> iterable) {
        int count = 0;

        if (iterable != null) {
            Iterator<T> iter = iterable.iterator();
            while (iter.hasNext()) {
                iter.next();
                count++;
            }
        }

        return count;
    }
}

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