Here you can find the source of iterableContains(Iterable
public static <O> boolean iterableContains(Iterable<O> iterable, O element)
//package com.java2s; /**/*from ww w .j ava2s . com*/ * Copyright 2012-2015 Niall Gallagher * * 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. */ public class Main { public static <O> boolean iterableContains(Iterable<O> iterable, O element) { for (O contained : iterable) { if (contained.equals(element)) { return true; } } return false; } }