Here you can find the source of containsAny(Collection
public static <T> boolean containsAny(Collection<T> collection, Collection<T> query)
//package com.java2s; /* /* w w w.j ava 2 s . c om*/ * RealmSpeak is the Java application for playing the board game Magic Realm. * Copyright (c) 2005-2015 Robin Warren * E-mail: robin@dewkid.com * * This program is free software: you can redistribute it and/or modify it under the terms of the * GNU General Public License as published by the Free Software Foundation, either version 3 of the License, * or (at your option) any later version. * * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. * * You should have received a copy of the GNU General Public License along with this program. If not, see * * http://www.gnu.org/licenses/ */ import java.util.Collection; public class Main { public static <T> boolean containsAny(Collection<T> collection, Collection<T> query) { if (collection == null || collection.isEmpty() || query == null || query.isEmpty()) return false; for (T val : query) { if (collection.contains(val)) return true; } return false; } }