Java List Count count(List values)

Description

Derives the number of values for the given list of values.

License

Open Source License

Parameter

Parameter	Description
values	A list of values

Return

The number of values. If the list null or the size is equals 0, then return null.

Declaration

public static Integer count(List<?> values) 

Method Source Code

//package com.java2s;
/*//from  w  w  w  .  j av a 2 s  . c o m
 * Copyright (c) 2012-2013 Open Source Community - <http://www.peerfact.org>
 * Copyright (c) 2011-2012 University of Paderborn - UPB
 * Copyright (c) 2005-2011 KOM - Multimedia Communications Lab
 *
 * This file is part of PeerfactSim.KOM.
 * 
 * PeerfactSim.KOM 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
 * any later version.
 * 
 * PeerfactSim.KOM 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 PeerfactSim.KOM.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

import java.util.List;

public class Main {
    /**
     * Derives the number of values for the given list of values.
     * 
     * @param values
     *            A list of values
     * @return The number of values. If the list null or the size is equals 0,
     *         then return null.
     */
    public static Integer count(List<?> values) {
        if (values == null || values.size() == 0) {
            return 0;
        }
        return values.size();
    }
}

Related

1. count(List l, int from, int to, Object what)
2. count(List lines)
3. countAtLevel(List aList, int aLevel)
4. countNumber(List list, int number)
5. countOccurances(List encodings, int value)