Java Collection Contain containsNull(final Collection c)

Description

contains Null

License

Open Source License

Return

true , if any of given collection's elements is null ; false otherwise

Declaration

public static boolean containsNull(final Collection<?> c) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2015, 2017 Lablicate GmbH.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:/*from w  w w  .ja  v  a  2 s.  co  m*/
 * Dr. Alexander Kerner - initial API and implementation
 *******************************************************************************/

import java.util.Collection;

public class Main {
    /**
     * @return {@code true}, if any of given collection's elements is {@code null}; {@code false}
     *         otherwise
     */
    public static boolean containsNull(final Collection<?> c) {

        synchronized (c) {
            for (final Object o : c) {
                if (o == null)
                    return true;
            }
            return false;
        }
    }
}

Related

1. containsNone(Collection container, Collection other)
2. containsNoNull(final Collection c, final String s)
3. containsNoNulls(Collection container)
4. containsNull(Collection collection)
5. containsNull(Collection