Java Iterable Count count(Iterable iterable)

Description

Returns the number of elements the iterable contains.

License

Open Source License

Parameter

Parameter	Description
iterable	the iterable

Return

the element count of the iterable

Declaration

public static <T> int count(Iterable<T> iterable) 

Method Source Code

//package com.java2s;
/*//w  w  w .  ja va 2 s  . co 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/>.
 */

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;
    }
}

Related

1. count(final Iterable iterable, final int step)
2. count(Iterable iterable)
3. count(Iterable i)
4. count(Iterable iterable)