Here you can find the source of toString(Map
static void toString(Map<String, String[]> map, StringBuilder sb)
//package com.java2s; /*//from w w w . j ava2s . com * Copyright (C) 2010 eXo Platform SAS. * * This is free software; you can redistribute it and/or modify it * under the terms of the GNU Lesser General Public License as * published by the Free Software Foundation; either version 2.1 of * the License, or (at your option) any later version. * * This software 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this software; if not, write to the Free * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA * 02110-1301 USA, or see the FSF site: http://www.fsf.org. */ import java.util.Iterator; import java.util.Map; public class Main { static void toString(Map<String, String[]> map, StringBuilder sb) { sb.append('{'); for (Iterator<Map.Entry<String, String[]>> i = map.entrySet().iterator(); i.hasNext();) { Map.Entry<String, String[]> entry = i.next(); sb.append(entry.getKey()).append('=').append('['); String[] value = entry.getValue(); for (int j = 0; j < value.length; j++) { if (j > 0) { sb.append(','); } sb.append(value[j]); } sb.append(']'); if (i.hasNext()) { sb.append(','); } } sb.append('}'); } }