TimeZones in Java

Question

I am allowing users on my web app to schedule events based on time zones of their choice.

I want to present a good list of time zones to the end user and then conver

Answer 1

Just to complement the answer by tbruyelle I added a few more countries (e.g. Canada), removed the "/" portion of the filter and provided a means to sort the list.

public static void main(String[] args)
{
    List simplifiedTimezoneList = getTimezoneIdList();

    for (String tz : simplifiedTimezoneList)
        System.out.println(tz);
}

public static List getTimezoneIdList()
{
    String[] temp = TimeZone.getAvailableIDs();
    List timezoneList = new ArrayList();
    List simplifiedTimezoneList = new ArrayList();
    for (String tz : temp)
    {
        timezoneList.add(tz);
    }
    Collections.sort(timezoneList);
    String filterList = "Canada|Mexico|Chile|Cuba|Brazil|Japan|Turkey|Mideast|Africa|America|Asia|Atlantic|Australia|Europe|Indian|Pacific";
    Pattern p = Pattern.compile("^(" + filterList + ").*");
    for (String tz : timezoneList)
    {
        Matcher m = p.matcher(tz);
        if (m.find())
        {
            simplifiedTimezoneList.add(tz);
        }
    }
    return simplifiedTimezoneList;
}