Java Collection First getFirstElementOrNull(Collection coll)

Description

get First Element Or Null

License

Open Source License

Return

the first element of given coll, if collection is non-null and non-empty. Otherwise null.

Declaration

public static <T> T getFirstElementOrNull(Collection<T> coll) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright (c) 2007 DSource.org and others.
 * 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 ww w . j  a v a  2 s. c  o  m
 *     Bruno Medeiros - initial implementation
 *******************************************************************************/

import java.util.Collection;

public class Main {
    /**
     * @return the first element of given coll, if collection is non-null and non-empty. Otherwise null. 
     */
    public static <T> T getFirstElementOrNull(Collection<T> coll) {
        if (coll == null || coll.isEmpty())
            return null;
        return coll.iterator().next();
    }
}

Related

1. getFirstAndOnly(Collection c)
2. getFirstClassOfType(Collection l, Class type)
3. getFirstElement(Collection coll)
4. getFirstElement(Collection collection, T defaultValue)
5. getFirstElementOrNull(Collection collection)
6. getFirstItem(Collection c)
7. getFirstItem(Collection collection)
8. getFirstItem(Collection c)
9. getFirstItemInCollection(Collection collection)