Java Collection Empty isEmpty(final Collection c)

Description

Checks whether the collection is empty, that means NULL or empty as in "no elements within".

License

Open Source License

Parameter

Parameter	Description
T	a parameter
c	Collection to check.

Return

True if the collection is NULL or contains no elements.

Declaration

public static <T> boolean isEmpty(final Collection<T> c) 

Method Source Code

//package com.java2s;
/*//from w  w  w  .  j a v  a 2s  .  co  m
 *  Copyright (C) 2010 vektor
 *
 *  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.Collection;

public class Main {
    /**
     * Checks whether the collection is empty, that means NULL or empty as in "no elements within".
     *
     * @param <T>
     * @param c Collection to check.
     * @return True if the collection is NULL or contains no elements.
     */
    public static <T> boolean isEmpty(final Collection<T> c) {
        return c == null || c.isEmpty();
    }

    /**
     * Checks whether the string is empty, that means NULL or equal to "".
     *
     * @param s String to check.
     * @return True if the string is NULL or has no characters.
     */
    public static boolean isEmpty(final String s) {
        return s == null || "".equals(s);
    }
}

Related

1. isEmpty(final Collection collection)
2. isEmpty(final Collection collection)
3. isEmpty(final Collection collection)
4. isEmpty(final Collection value)
5. isEmpty(final Collection c)
6. isEmpty(final Collection collection)
7. isEmpty(final Collection source)
8. isEmpty(final Collection v)
9. isEmptyCollection(Collection collection)