Convert milliseconds to readable string in Java

/* w w w  . j a  va 2s. c o  m*/
/*
 GNU LESSER GENERAL PUBLIC LICENSE
 Copyright (C) 2006 The Lobo Project

 This library 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 library 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 library; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

 Contact info: lobochief@users.sourceforge.net
 */

public class Main {
  public static void main(String[] argv) {
    System.out.println(getElapsedText(1231231212L));
  }

  public static double round1(double value) {
    return Math.round(value * 10.0) / 10.0;
  }

  public static String getElapsedText(long elapsedMillis) {
    if (elapsedMillis < 60000) {
      double unit = round1(elapsedMillis / 1000.0);
      return unit + (unit == 1 ? " second" : " seconds");
    } else if (elapsedMillis < 60000 * 60) {
      double unit = round1(elapsedMillis / 60000.0);
      return unit + (unit == 1 ? " minute" : " minutes");
    } else if (elapsedMillis < 60000 * 60 * 24) {
      double unit = round1(elapsedMillis / (60000.0 * 60));
      return unit + (unit == 1 ? " hour" : " hours");
    } else {
      double unit = round1(elapsedMillis / (60000.0 * 60 * 24));
      return unit + (unit == 1 ? " day" : " days");
    }
  }
}