Here you can find the source of listToString(List extends Object> list)
public static String listToString(List<? extends Object> list)
//package com.java2s; /**************************************************************************** ** ** Copyright (C) 2011 Darryl L. Miles. All rights reserved. ** Copyright (C) 2011 D L Miles Consulting Ltd. All rights reserved. ** ** This file is part of Qt Jambi./*from w w w. ja va 2s. co m*/ ** ** ** $BEGIN_LICENSE$ ** GNU Lesser General Public License Usage ** This file may be used under the terms of the GNU Lesser ** General Public License version 2.1 as published by the Free Software ** Foundation and appearing in the file LICENSE.LGPL included in the ** packaging of this file. Please review the following information to ** ensure the GNU Lesser General Public License version 2.1 requirements ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html ** ** In addition, as a special exception, the copyright holders grant you ** certain additional rights. These rights are described in the Nokia Qt ** LGPL Exception version 1.0, included in the file LGPL_EXCEPTION.txt in ** this package. ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 2.0 as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL2 included in the ** packaging of this file. Please review the following information to ** ensure the GNU General Public License version 2.0 requirements will be ** met: http://www.gnu.org/licenses/gpl-2.0.html ** ** GNU General Public License Usage ** Alternatively, this file may be used under the terms of the GNU ** General Public License version 3.0 as published by the Free Software ** Foundation and appearing in the file LICENSE.GPL3 included in the ** packaging of this file. Please review the following information to ** ensure the GNU General Public License version 3.0 requirements will be ** met: http://www.gnu.org/copyleft/gpl.html ** $END_LICENSE$ ** ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. ** ****************************************************************************/ import java.util.List; public class Main { public static String listToString(List<? extends Object> list) { StringBuffer sb = new StringBuffer(); sb.append("["); boolean first = true; for (Object o : list) { if (first) first = false; else sb.append(", "); sb.append(o.toString()); } sb.append("]"); return sb.toString(); } }