Here you can find the source of getNumberListSorted(String pagesStr)
public static List<Integer> getNumberListSorted(String pagesStr) throws NumberFormatException
//package com.java2s; /* /*from w w w . j ava2s. com*/ * Copyright (C) 2000 - 2008 TagServlet Ltd * * This file is part of Open BlueDragon (OpenBD) CFML Server Engine. * * OpenBD is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * Free Software Foundation,version 3. * * OpenBD 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 General Public License for more details. * * You should have received a copy of the GNU General Public License * along with OpenBD. If not, see http://www.gnu.org/licenses/ * * Additional permission under GNU GPL version 3 section 7 * * If you modify this Program, or any covered work, by linking or combining * it with any of the JARS listed in the README.txt (or a modified version of * (that library), containing parts covered by the terms of that JAR, the * licensors of this Program grant you additional permission to convey the * resulting work. * README.txt @ http://www.openbluedragon.org/license/README.txt * * http://www.openbluedragon.org/ */ import java.util.ArrayList; import java.util.Collections; import java.util.HashSet; import java.util.Iterator; import java.util.List; import java.util.Set; public class Main { public static List<Integer> getNumberListSorted(String pagesStr) throws NumberFormatException { Set<Integer> set = getNumberSet(pagesStr); List<Integer> list = new ArrayList<Integer>(set.size()); Iterator<Integer> it = set.iterator(); while (it.hasNext()) list.add(it.next()); Collections.sort(list); return list; } public static Set<Integer> getNumberSet(String pagesStr) throws NumberFormatException { if (pagesStr.length() == 0) { return null; } else { HashSet<Integer> pages = new HashSet<Integer>(); String[] pageArr = pagesStr.split(","); for (int i = 0; i < pageArr.length; i++) { String nextPage = pageArr[i].trim(); int rangeIndx = pageArr[i].indexOf('-'); if (rangeIndx < 0) { pages.add(Integer.parseInt(nextPage)); } else { int start = Integer.parseInt(nextPage.substring(0, rangeIndx)); int end = Integer.parseInt(nextPage.substring(rangeIndx + 1)); for (int j = start; j <= end; j++) { pages.add(j); } } } return pages; } } }