Java tutorial
//package com.java2s; /* * Copyright 2014 EUBrazilCC (EU?Brazil Cloud Connect) * * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by * the European Commission - subsequent versions of the EUPL (the "Licence"); * You may not use this work except in compliance with the Licence. * You may obtain a copy of the Licence at: * * http://ec.europa.eu/idabc/eupl * * Unless required by applicable law or agreed to in writing, software * distributed under the Licence is distributed on an "AS IS" basis, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the Licence for the specific language governing permissions and * limitations under the Licence. * * This product combines work with different licenses. See the "NOTICE" text * file for details on the various modules and licenses. * The "NOTICE" text file is part of the distribution. Any derivative works * that you distribute must include a readable copy of the "NOTICE" text file. */ import static com.google.common.base.Predicates.notNull; import static com.google.common.collect.FluentIterable.from; import java.util.ArrayList; import java.util.Arrays; import java.util.Collection; import com.google.common.base.Function; public class Main { public static <E> String collectionToString(final Collection<E> collection) { return Arrays.toString( from(collection != null ? collection : new ArrayList<E>()).transform(new Function<E, String>() { @Override public String apply(final E item) { return item != null ? item.toString() : null; } }).filter(notNull()).toArray(String.class)); } }