Here you can find the source of firstElement(Iterable
| Parameter | Description |
|---|---|
| iterable | a parameter |
public static <E> E firstElement(Iterable<E> iterable)
//package com.java2s; /******************************************************************************* * Copyright 2011 Danny Kunz//from w w w. j a v a 2s . com * * 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. ******************************************************************************/ import java.util.Iterator; public class Main { /** * Returns the first element of the given {@link Iterable} * * @param iterable * @return */ public static <E> E firstElement(Iterable<E> iterable) { // final int indexPosition = 0; return elementAt(iterable, indexPosition); } /** * Returns the element of the given {@link Iterable} at the given index position. Does never throw an {@link Exception} instead * returns null if no element could be resolved. * * @param iterable * @param indexPosition * @return */ public static <E> E elementAt(final Iterable<E> iterable, final int indexPosition) { // E retval = null; // if (iterable != null) { // final Iterator<E> iterator = iterable.iterator(); if (iterator != null) { for (int ii = 0; ii <= indexPosition && iterator.hasNext(); ii++) { // final E nextElement = iterator.next(); if (ii == indexPosition) { retval = nextElement; } } } } // return retval; } }