Java Utililty Methods Date Value Check

List of utility methods to do Date Value Check

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Description

The list of methods to do Date Value Check are organized into topic(s).

Method

booleanisDateFormat(String dateString)
is Date Format 
if (dateString.length() > TEMPLATE_DATEFORMAT.length())
    return false;
SimpleDateFormat sdf = new SimpleDateFormat(TEMPLATE_DATEFORMAT);
try {
    sdf.parse(dateString);
    return true;
} catch (ParseException e) {
    return false;
...
booleanisDateFormat(String str, String format)
is Date Format 
if (hasText(str) || hasText(format)) {
    return false;
SimpleDateFormat sdf = new SimpleDateFormat(format);
sdf.setLenient(true);
Date date = sdf.parse(str);
String str2 = sdf.format(date);
if (!str.equals(str2)) {
...
booleanisDateFormatString(String s, String dateFormat, Locale locale)
Return true if a string can be parsed by the dateFormat with locale. 
String dateformat = parseDateFormat(dateFormat);
SimpleDateFormat f = new SimpleDateFormat(dateformat, locale);
f.setLenient(false);
try {
    f.parse(s);
    return true;
} catch (Exception ex) {
    return false;
...
booleanisDateFormatValid(final String pattern)

Validates a DateFormat format String string . 

boolean result = false;
try {
    new SimpleDateFormat(pattern);
    result = true; 
} catch (Throwable t) {
return result;
booleanisDateInRange(Date startDt, Date endDt, Date theDate)
is Date In Range 
if (theDate.compareTo(startDt) == 0 || theDate.compareTo(endDt) == 0
        || (theDate.after(startDt) && theDate.before(endDt))) {
    return true;
} else {
    return false;
booleanisDateInRange(Date toCheck, Date minRange, Date maxRange)
is Date In Range 
String toCheckStr = formatYmd(toCheck);
return ((minRange == null || toCheckStr.compareTo(formatYmd(minRange)) >= 0)
        && (maxRange == null || toCheckStr.compareTo(formatYmd(maxRange)) <= 0));
booleanIsDateOK(String date)
Returns true if the date is in format year/month/day, false if not 
try {
    DateFormat fmt = new SimpleDateFormat("yyyy/MM/dd");
    Date d = fmt.parse(date);
    return true;
} catch (Exception e) {
    return false;
booleanisDateSortedAsc(List dates, String format)
Determines if the list of dates is sorted in ascending order 
boolean sorted = true;
Iterator<String> iList = dates.iterator();
String first = iList.next();
try {
    Date curr = new SimpleDateFormat(format, Locale.ENGLISH).parse(first);
    while (iList.hasNext()) {
        String next = iList.next();
        Date nextDate = new SimpleDateFormat(format, Locale.ENGLISH).parse(next);
...
booleanisDateTwo(String value)
qli comment the method "isDateTwo". 
if (value != null) {
    try {
        String dateFormat = "yyyy-MM-dd";
        SimpleDateFormat simpleDateFormat = new SimpleDateFormat(dateFormat);
        Date dt = simpleDateFormat.parse(value);
        simpleDateFormat.format(dt);
        return true;
    } catch (ParseException pe) {
...
booleanisDateValid(String date, Locale locale)
Because the date passed as argument can be in java format, and because not all formats are compatible with joda-time, this method checks if the date string is valid with java. 
try {
    DateFormat format = DateFormat.getDateTimeInstance(DateFormat.DEFAULT, DateFormat.DEFAULT, locale);
    format.parse(date);
    return true;
} catch (ParseException e) {
    return false;