Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/**
 * utils: general utility functions.
 * <br>Copyright 2004-2009 Ian Cameron Smith
 *
 * <p>This program 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 (see COPYING).
 *
 * <p>This program 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.
 *
 * <p>You should have received a copy of the GNU General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 */

import java.util.TimeZone;

public class Main {
    /**
     * Produce a string describing the offset of the given time zone from
     * UTC, including the DST offset if there is one.
     * 
     * @param   zone         TimeZone whose offset we want.
     * @return               Formatted offset.
     */
    public static String formatOffsetFull(TimeZone zone) {
        String fmt = zone.getID() + ": ";

        int base = zone.getRawOffset();
        fmt += zone.getDisplayName(false, TimeZone.LONG) + "=UTC" + intervalMsToHmsShort(base);

        int dst = zone.getDSTSavings();
        if (dst != 0)
            fmt += " (" + zone.getDisplayName(true, TimeZone.LONG) + "=UTC" + intervalMsToHmsShort(base + dst)
                    + ")";

        return fmt;
    }

    /**
     * Format a time offset as hours, minutes and seconds, only including
     * the relevant components.  If the offset is less than 60 sec, only
     * the seconds will be included; if the offset is an exact number of
     * hours, only hours; etc.
     *
     * @param   off         The time offset in ms to format.
     * @return            The formatted value.
     */
    public static String intervalMsToHmsShort(long off) {
        if (off == 0)
            return "";

        String hms = "";

        off /= 1000;
        if (off >= 0) {
            hms += "+";
        } else {
            hms += "-";
            off = -off;
        }

        if (off >= 3600) {
            hms += (off / 3600) + "h";
            off = off % 3600;
        }
        if (off >= 60) {
            hms += (off / 60) + "m";
            off = off % 60;
        }
        if (off > 0)
            hms += off + "s";

        return hms;
    }
}