Java Utililty Methods Date Time to String

if (dateTime == null)
    return null;
return FORMAT_DATE_TIME.format(dateTime.getTime());

if (d == null)
    return null;
return dfDateTime.format(d);

c1.setTime(d);
Date date = c1.getTime();
String strDate = "";
SimpleDateFormat sdf = new SimpleDateFormat("dd.MM.yyyy HH:mm");
strDate = sdf.format(date);
return strDate;

return dt.format(date);

String _pattern = "yyyy-MM-dd HH:mm:ss";
return date == null ? null : DateToString(date, _pattern);

if (date == null)
    return "";
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
return sdf.format(date);

Format format = getDateFormater();
String timeToSeconds = format.format(date);
return timeToSeconds;

if (date == null) {
    return "";
DateFormat df = new SimpleDateFormat(formatter);
return df.format(date);

DateFormat formatterTime = new SimpleDateFormat(TIME_FORMAT);
String timeString = formatterTime.format(date);
return timeString;

String result = "";
result = DATE_TIME.format(date);
return result;