Java Utililty Methods Date to String

TimeZone tz = TimeZone.getTimeZone("UTC");
SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.S'Z'");
dateFormat.setTimeZone(tz);
return dateFormat.format(date);

System.out.println("To Oracle Date; [" + formatDate(date, "dd-MMM-yy") + "]");
return formatDate(date, "dd-MMM-yy");

SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
Date now = new Date();
long between = (now.getTime() - date.getTime()) / 1000;
long day = between / (24 * 3600);
long hour = between % (24 * 3600) / 3600;
long minute = between % 3600 / 60;
long second = between;
String timeStr;
...

SimpleDateFormat dateFormat = new SimpleDateFormat(DATE_FORMAT, new Locale("en"));
dateFormat.setTimeZone(TimeZone.getTimeZone(GMT));
String result = dateFormat.format(date);
return result;

StringBuilder result = new StringBuilder(rfc3339.format(d));
Calendar cal = new GregorianCalendar();
cal.setTime(d);
cal.setTimeZone(TimeZone.getDefault());
int offset_millis = cal.get(Calendar.ZONE_OFFSET) + cal.get(Calendar.DST_OFFSET);
int offset_hours = Math.abs(offset_millis / (1000 * 60 * 60));
int offset_minutes = Math.abs((offset_millis / (1000 * 60)) % 60);
if (offset_millis == 0) {
...

String s = "";
if (date == null) {
    return "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
try {
    s = sdf.format(date);
} catch (Exception e) {
...

if (date == null) {
    return "";
return dateToString(date, NORMAL_PATTERN);

return dateToStr(date, "yyyy/MM/dd");

SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
return formatter.format(date).trim();

switch (type) {
case 0:
    return dateToStr(date);
case 1:
    return dateToStr(date, "yyyy/MM");
case 2:
    return dateToStr(date, "yyyyMMdd");
case 11:
...