Here you can find the source of refineHourMinute(String timeString)
public static String refineHourMinute(String timeString)
//package com.java2s; /*//from w w w . j a va 2 s. c o m * This file is part of TrackWorkTime (TWT). * * TWT is free software: you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * TWT 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 TWT. If not, see <http://www.gnu.org/licenses/>. */ public class Main { /** * Prepare the a user-entered time string to represent "hours:minutes". */ public static String refineHourMinute(String timeString) { String ret = timeString.replace('.', ':'); // only one digit as hour ret = ret.replaceAll("^(\\d):", "0$1:"); // only one digit as minute ret = ret.replaceAll(":(\\d)$", ":0$1"); return ret; } }