wicket.markup.html.form.ListChoice

<select wicket:id="site">
<option>site 1</option>
<option>site 2</option>
</select>

private static final List SITES = Arrays.asList(new String[] { "The Server Side", "Java Lobby", "Java.Net" });
...
    // Add a list choice component that uses the model object's 'site' property to designate the
    // current selection, and that uses the SITES list for the available options.
    ListChoice listChoice = new ListChoice("site", SITES);
    listChoice.setMaxRows(4);
    form.add(listChoice);