Java Utililty Methods Date Start

 Start time of the given date, specific to the second. 
Date result = null;
if (date != null) {
    Calendar calendar = getCalendar(date);
    int year = calendar.get(Calendar.YEAR);
    int month = calendar.get(Calendar.MONTH);
    int day = calendar.get(Calendar.DATE);
    calendar.set(year, month, day, 0, 0, 0);
    calendar.set(Calendar.MILLISECOND, 0);
...

Calendar currentCalendar = new GregorianCalendar();
currentCalendar.setTime(date);
currentCalendar.set(HOUR_OF_DAY, 0);
currentCalendar.set(MINUTE, 0);
currentCalendar.set(SECOND, 0);
return currentCalendar.getTime();

String dateSplit = getDateSplit();
if (dateSplit.equals("."))
    dateSplit = "\\.";
StringTokenizer filter = new StringTokenizer(dateStr, dateSplit);
int year = Integer.parseInt(filter.nextToken());
int mon = Integer.parseInt(filter.nextToken()) - 1;
int day = Integer.parseInt(filter.nextToken());
Calendar cal = new GregorianCalendar(year, mon, day);
...

Calendar calendar = Calendar.getInstance();
StringBuffer sb = new StringBuffer();
int month = calendar.get(Calendar.MONTH) + 1;
int day = calendar.get(Calendar.DAY_OF_MONTH);
sb.append(calendar.get(Calendar.YEAR));
if (month < 10) {
    sb.append(0);
    sb.append(month);
...

int i = pos - 1;
Calendar cal = Calendar.getInstance();
cal.set(Calendar.YEAR, toInt(block, i, 4));
cal.set(Calendar.MONTH, toInt(block, (i = i + 4), 2) - 1);
cal.set(Calendar.DATE, toInt(block, (i = i + 2), 2));
cal.set(Calendar.HOUR_OF_DAY, toInt(block, (i = i + 2), 2));
cal.set(Calendar.MINUTE, toInt(block, (i = i + 2), 2));
cal.set(Calendar.SECOND, toInt(block, (i = i + 2), 2));
...

String[] split = dateString.split("/");
return new GregorianCalendar(Integer.parseInt(split[2]), Integer.parseInt(split[1]) - 1,
        Integer.parseInt(split[0]));