Here you can find the source of getFirst(Iterable
public static <T> T getFirst(Iterable<T> iterable)
//package com.java2s; /*// w ww.j a v a2 s . co m * Copyright Siemens AG, 2014-2016. * With modifications by Bosch Software Innovations GmbH, 2016 * Part of the SW360 Portal Project. * * SPDX-License-Identifier: EPL-1.0 * * 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 */ import java.util.*; public class Main { public static <T> T getFirst(Iterable<T> iterable) { final Iterator<T> iterator = iterable.iterator(); if (iterator.hasNext()) { return iterator.next(); } else { throw new NoSuchElementException(); } } }