Here you can find the source of indexOfSame(Iterable
public static <T> int indexOfSame(Iterable<T> iterable, T obj)
//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 www . j a v a2 s. c om*/ * Bruno Medeiros - initial implementation *******************************************************************************/ import java.util.Iterator; public class Main { public static <T> int indexOfSame(Iterable<T> iterable, T obj) { int ix = 0; Iterator<? extends T> iterator = iterable.iterator(); while (iterator.hasNext()) { T element = iterator.next(); if (element == obj) return ix; ix++; } return -1; } }