Here you can find the source of printList(List
private static String printList(List<Long> list)
//package com.java2s; /**/*from w w w . j av a 2 s. c o m*/ * Copyright (c) 2011, 2014 Eurotech and/or its affiliates * * 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: * Eurotech */ import java.util.List; public class Main { private static final String whiteSpace = " "; private static String printList(List<Long> list) { StringBuilder sb = new StringBuilder(); for (Long id : list) { sb.append(id + whiteSpace); } return sb.toString(); } }