versionNames = new HashMap<String, AppVersion>();
timeStamps = new TreeMap<Long, AppVersion>();
Set<AppVersion> versions = new HashSet<AppVersion>();
SimpleDateFormat format = new SimpleDateFormat("MMMMM dd, yyyy", Locale.ENGLISH);
versions.add(new AppVersion(0, format.parse("June 1, 2005"), "v1.0"));
versions.add(new AppVersion(1, format.parse("June 10, 2005"), "v1.1"));
versions.add(new AppVersion(2, format.parse("June 20, 2005"), "v2.0"));
for (AppVersion v : versions) {
versionNames.put(v.getReleaseName(), v);
timeStamps.put(v.getTimestamp(), v);
}