Java Utililty Methods SQL Time Create

Calendar cal = Calendar.getInstance();
cal.setTime(new java.util.Date(0));
cal.set(Calendar.HOUR_OF_DAY, hour);
cal.set(Calendar.MINUTE, minute);
cal.set(Calendar.SECOND, second);
cal.set(Calendar.MILLISECOND, 0);
return getSqlTime(cal.getTime());

String[] timeStrings = timeString.split(":");
int hour = Integer.parseInt(timeStrings[0]);
int minute = Integer.parseInt(timeStrings[1]);
Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, hour);
calendar.set(Calendar.MINUTE, minute);
Time time = new Time(calendar.getTimeInMillis());
return time;
...

Time result = null;
assert value != null : "[DSU] invalid value : " + value;
if (value != null) {
 DateFormat TIME_FORMAT = new SimpleDateFormat("HH:mm:ss");
 result = new Time(getDate(TIME_FORMAT, value).getTime());
return result;

return java.sql.Time.valueOf(s);

int leftover = time;
final int hour = leftover / (60 * 60 * 1000);
leftover -= hour * 60 * 60 * 1000;
final int minute = leftover / (60 * 1000);
leftover -= minute * 60 * 1000;
final int second = leftover / 1000;
leftover -= second * 1000;
final int milli = leftover;
...

String str = new Timestamp(System.currentTimeMillis()).toString();
if (str.length() >= 23) {
 return str.substring(0, 23);
} else {
 StringBuilder sb = new StringBuilder();
 sb.append(str);
 for (int i = 0; i < 23 - str.length(); i++) {
 sb.append("0");
...

return new Timestamp(System.currentTimeMillis());

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
Timestamp today = toTimestamp(sdf.format(Calendar.getInstance().getTime()) + " 00:00:00");
return toGMTTime(today);

Timestamp sys_time = new Timestamp(Calendar.getInstance().getTimeInMillis());
return sys_time;

Calendar today = Calendar.getInstance();
today.set(Calendar.DAY_OF_WEEK, today.getFirstDayOfWeek());
Calendar weekFirstDay = Calendar.getInstance();
weekFirstDay.clear();
weekFirstDay.set(Calendar.YEAR, today.get(Calendar.YEAR));
weekFirstDay.set(Calendar.MONTH, today.get(Calendar.MONTH));
weekFirstDay.set(Calendar.DATE, today.get(Calendar.DATE));
return weekFirstDay.getTime();
...