Java Utililty Methods Date Format

final DateFormat dateFormat = formatSupplier.get();
if (dateFormat == null) {
    return String.valueOf((date).getTime());
return dateFormat.format(date);

final SimpleDateFormat dateFormat = new SimpleDateFormat(DATE);
final StringBuilder sb = new StringBuilder();
Date date = new Date();
sb.append(String.valueOf(day) + "-");
sb.append(String.valueOf(month) + "-");
sb.append(String.valueOf(year));
try {
    date = dateFormat.parse(sb.toString());
...

if (year == null) {
    return null;
Date date = new GregorianCalendar(year, month != null ? month - 1 : 0, day != null ? day : 1).getTime();
if (month == null) {
    return new SimpleDateFormat("yyyy").format(date);
} else if (day == null) {
    return new SimpleDateFormat("yyyy-MM").format(date);
...

return (formatDate(in.getTime()));

return format(date, "yyyy-MM-dd");

if (paramDate == null)
    return null;
SimpleDateFormat localSimpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
localSimpleDateFormat.setLenient(false);
return localSimpleDateFormat.format(paramDate);

if (obj == null) {
    return "";
try {
    java.util.Date dateval = (java.util.Date) obj;
    SimpleDateFormat dateformat = new SimpleDateFormat("MM/dd/yyyy");
    dateformat.setLenient(false);
    return dateformat.format(dateval);
...

return dateFormat6.format(date);