Java Iterable First first(final Iterable iterable)

Description

first

License

Apache License

Parameter

Parameter	Description
iterable	a parameter

Return

null if the iterable element is null or if there are no elements in it or the first element if it does

Declaration

public static <E> E first(final Iterable<E> iterable) 

Method Source Code

//package com.java2s;
/*******************************************************************************
 * Copyright 2015 xWic group (http://www.xwic.de)
 *
 * Licensed under the Apache License, Version 2.0 (the "License").
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *       http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and 
 * limitations under the License./*from  w w  w  . ja va 2  s .  c om*/
 *  
 *******************************************************************************/

import java.util.Iterator;

public class Main {
    /**
     * @param iterable
     * @return null if the iterable element is null or if there are no elements in it or the first element if it does
     */
    public static <E> E first(final Iterable<E> iterable) {
        if (null == iterable) {
            return null;
        }
        final Iterator<E> it = iterable.iterator();
        if (!it.hasNext()) {
            return null;
        }
        return it.next();
    }
}

Related

1. equal(Iterable first, Iterable second)
2. first(final Iterable iter)
3. first(Iterable iterable)
4. first(Iterable i)
5. first(Iterable iterable)