Java Utililty Methods Date to Time

return getTime(date.getTime());

return format(date, "HH:mm:ss");

Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
int hour = calendar.get(Calendar.HOUR_OF_DAY);
int minute = calendar.get(Calendar.MINUTE);
int second = calendar.get(Calendar.SECOND);
return hour * 10000 + minute * 100 + second;

Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.setTimeZone(TimeZone.getTimeZone("UTC"));
if (isEnd) {
    calendar.set(Calendar.HOUR_OF_DAY, 23);
    calendar.set(Calendar.MINUTE, 59);
    calendar.set(Calendar.SECOND, 59);
    calendar.set(Calendar.MILLISECOND, 999);
...

SimpleDateFormat formatter = new SimpleDateFormat(pattern, locale);
return formatter.format(date);

if (dateParam == null) {
    throw new IllegalArgumentException("The dateParam  must not be null");
Calendar cal = Calendar.getInstance();
cal.setTimeInMillis(dateParam.getTime());
int hour = cal.get(Calendar.HOUR);
int minute = cal.get(Calendar.MINUTE);
int second = cal.get(Calendar.SECOND);
...

SimpleDateFormat formatter = new SimpleDateFormat("HH:mm:ss");
return formatter.format(executionTime);

Calendar cal = Calendar.getInstance();
cal.setTime(timestamp);
int hour = cal.get(Calendar.HOUR_OF_DAY);
int minute = cal.get(Calendar.MINUTE);
int value = hour * 100 + minute;
return getBytes(value);

return dateToString(trialTime, DF_HMS);

final Calendar calendar = Calendar.getInstance();
calendar.setTime(date);
calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) + day);
return calendar.getTime();