Here you can find the source of formatPhoneNumber(String numberString)
public static String formatPhoneNumber(String numberString)
//package com.java2s; /**//from w w w. j ava2s . c om * Funf: Open Sensing Framework * Copyright (C) 2010-2011 Nadav Aharony, Wei Pan, Alex Pentland. * Acknowledgments: Alan Gardner * Contact: nadav@media.mit.edu * * This file is part of Funf. * * Funf 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 3 of * the License, or (at your option) any later version. * * Funf 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 Funf. If not, see <http://www.gnu.org/licenses/>. */ public class Main { public static String formatPhoneNumber(String numberString) { numberString = numberString.replaceAll("[^0-9]+", ""); int i = numberString.length(); if (i <= 10) return numberString; else return numberString.substring(i - 10); // only look at the last 10 // numbers } }