Java Utililty Methods Date to String

String strDate = null;
if ((formartStr != null) && (!"".equals(formartStr))) {
    SimpleDateFormat sdf = new SimpleDateFormat(formartStr);
    strDate = sdf.format(date);
return strDate;

if (date == null) {
    return null;
DateFormat dateFormat = new SimpleDateFormat(format);
dateFormat.setLenient(true);
return dateFormat.format(date);

DateFormat formatter;
formatter = new SimpleDateFormat(format);
return formatter.format(date);

SimpleDateFormat sdf = new SimpleDateFormat(format);
try {
    return sdf.format(date);
} catch (Exception e) {
    return null;

GregorianCalendar cal = new GregorianCalendar(UTC_TIME_ZONE);
cal.setTime(date);
String[] params = new String[6];
params[0] = formatInteger(cal.get(Calendar.YEAR), 4);
params[1] = formatInteger(cal.get(Calendar.MONTH) + 1, 2);
params[2] = formatInteger(cal.get(Calendar.DAY_OF_MONTH), 2);
params[3] = formatInteger(cal.get(Calendar.HOUR_OF_DAY), 2);
params[4] = formatInteger(cal.get(Calendar.MINUTE), 2);
...

try {
    if (date != null)
        return new SimpleDateFormat(format).format(date);
} catch (Exception e) {
    e.printStackTrace();
    System.gc();
return null;
...

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

DateFormat format = new SimpleDateFormat(formatStr);
return format.format(date);

String dateString = null;
if (date != null) {
    try {
        dateString = getDateFormat(parttern).format(date);
    } catch (Exception e) {
return dateString;
...

String strDateTime = null;
SimpleDateFormat formater = new SimpleDateFormat(pattern);
strDateTime = date == null ? null : formater.format(date);
return strDateTime;