Here you can find the source of asString(List list)
public static String asString(List list)
//package com.java2s; /**/* ww w .j a v a2 s .co m*/ * $Revision $ * $Date $ * * Copyright (C) 2005-2010 Jive Software. All rights reserved. * * 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. */ import java.util.Iterator; import java.util.List; public class Main { public static String asString(List list) { if (list == null || list.isEmpty()) return ""; StringBuilder builder = new StringBuilder(); for (Iterator i$ = list.iterator(); i$.hasNext(); builder.append(",")) { long a = ((Long) i$.next()).longValue(); builder.append(a); } if (builder.charAt(builder.length() - 1) == ',') builder.deleteCharAt(builder.length() - 1); return builder.toString(); } }