Here you can find the source of strMillis(final long ns)
static public String strMillis(final long ns)
//package com.java2s; /*// ww w . j a va2 s. c o m * DomUI Java User Interface - shared code * Copyright (c) 2010 by Frits Jalvingh, Itris B.V. * * 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 Street, Fifth Floor, Boston, MA 02110-1301 USA * * See the "sponsors" file for a list of supporters. * * The latest version of DomUI and related code, support and documentation * can be found at http://www.domui.org/ * The contact for the project is Frits Jalvingh <jal@etc.to>. */ public class Main { static private final long[] MSTIMESET = { 60 * 60 * 1000, 60 * 1000, 1000, 1 }; static private final String[] MSSUFFIXES = { "H", "m", "s", "ms" }; static public String strMillis(final long ns) { if (ns < 1000) return ns + " ms"; StringBuilder sb = new StringBuilder(); for (int i = 0; i < MSTIMESET.length; i++) { if (ns >= MSTIMESET[i]) { long u = ns / MSTIMESET[i]; sb.append(Long.toString(u)); sb.append(MSSUFFIXES[i]); sb.append(' '); u = ns % MSTIMESET[i]; i++; u = u / MSTIMESET[i]; sb.append(Long.toString(u)); sb.append(MSSUFFIXES[i]); return sb.toString(); } } return ns + "ms"; } }