Java Utililty Methods Weekend

String lDayName = aInCal.getDisplayName(Calendar.DAY_OF_WEEK, Calendar.SHORT, Locale.getDefault());
if (Objects.equals(lDayName, new String("Sun")) || (Objects.equals(lDayName, new String("Sat")))) {
    return true;
return false;

Calendar cal = Calendar.getInstance();
Date d = strToDtSimpleFormat(date);
cal.setTime(d);
int day = cal.get(Calendar.DAY_OF_WEEK);
if (day == Calendar.SUNDAY || day == Calendar.SATURDAY) {
    return true;
return false;
...

SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
Date time = null;
try {
    time = df.parse(date);
} catch (ParseException e) {
    e.printStackTrace();
Calendar cal = Calendar.getInstance();
...

if (getCurWeekDayByStr(date) == 1 || getCurWeekDayByStr(date) == 7) {
    return true;
return false;

Calendar cal = Calendar.getInstance();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
try {
    cal.setTime(sdf.parse(dateStr));
    int n = cal.get(Calendar.DAY_OF_WEEK);
    return n == Calendar.SATURDAY || n == Calendar.SUNDAY;
} catch (ParseException e) {
    e.printStackTrace();
...

if (datestr == null || "".equals(datestr.trim())) {
    return false;
SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
try {
    Date date = myFormatter.parse(datestr);
    Calendar calendar = new GregorianCalendar();
    calendar.setTime(date);
...

GregorianCalendar gc = new GregorianCalendar();
gc.setTime(getDate(date, pattern));
int ret = gc.get(Calendar.DAY_OF_WEEK) - 1;
if (ret == 0 || ret == 6) {
    return true;
return false;