Java Utililty Methods Date String Format

List of utility methods to do Date String Format

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Description

The list of methods to do Date String Format are organized into topic(s).

Method

StringdateFormat(String date)
date Format 
if (date.length() == 10) {
    return date.substring(0, 2) + "-" + date.substring(2, 4) + ' ' + date.substring(4, 6) + ':'
            + date.substring(6, 8) + ':' + date.substring(8, 10);
} else if (date.length() == 8) {
    return date.substring(0, 4) + "-" + date.substring(4, 6) + "-" + date.substring(6, 8);
} else if (date.length() == 6) {
    return date.substring(0, 2) + ":" + date.substring(2, 4) + ":" + date.substring(4, 6);
} else if (date.length() == 4) {
...
StringdateFormat(String datetime)
date Format 
String date = "";
if (datetime != null && !"null".equals(datetime.trim()) && !"".equals(datetime.trim())
        && datetime.length() > 10) {
    if ("00:00:00".equals(datetime.substring(11, 19))) {
        date = datetime.substring(0, 10);
    } else {
        date = datetime.substring(0, 19);
} else {
    date = datetime;
return date;
StringdateFormat(String strYear, String strMonth, String strDay)
date Format 
if (strYear == null || strYear.equals(""))
    return "";
if (strMonth == null || strMonth.equals(""))
    return "";
if (strDay == null || strDay.equals(""))
    return "";
strYear = strYear.trim();
strMonth = strMonth.trim();
...
StringdateFormatFix(String str)
date Format Fix 
if (str.indexOf("M") != -1 && str.indexOf("MM") == -1 && str.indexOf("MMM") == -1) {
    str = str.replaceAll("M", "MM");
if (str.indexOf("d") != -1 && str.indexOf("dd") == -1 && str.indexOf("ddd") == -1) {
    str = str.replaceAll("d", "dd");
if (str.indexOf("y") != -1 && str.indexOf("yy") == -1 && str.indexOf("yyy") == -1) {
    str = str.replaceAll("y", "yy");
...
StringformatDate(byte[] btValue, int iOffset, int iLength)
format Date 
if ((btValue.length < iOffset + iLength) || (iLength < 4))
    return "";
return getBCDString(btValue[iOffset + 3]) + "/" + getBCDString(btValue[iOffset + 2]) + "/"
        + getBCDString(btValue[iOffset + 0]) + getBCDString(btValue[iOffset + 1]);
StringformatDate(int year, int month, int day)
format Date 
return String.format("%d-%02d-%02d", year, month, day);
StringformatDate(Integer date)
format Date 
try {
    return (date + "").substring(0, 4) + "-" + (date + "").substring(4, 6) + "-"
            + (date + "").substring(6, 8);
} catch (Exception e) {
    e.printStackTrace();
    return "";
StringformatDate(Integer day, Integer month, Integer year)
Get a date in the form MonthDayYear where Mmm is a 3-letter month abbrev, day is of the form Dth and year is of the form YYYY (where D and Y are digits and th is the appropriate number extension for the day. 
final StringBuilder result = new StringBuilder();
if (month != null) {
    result.append(MONTH_ABBREVS[month]);
if (day != null) {
    result.append(Integer.toString(day)).append(getNumberSuffix(day));
if (year != null) {
...
StringFormatDate(String aDate)
Change the separator of the date 
String[] lParts = aDate.split("\\.", 0);
return String.format("%s-%s-%s", lParts[0], lParts[1], lParts[2]);
StringformatDate(String date)
format Date 
final String template = "2010-01-01T00:00:00Z";
final int tl = template.length();
final int dl = date.length();
if (dl > tl)
    return date.substring(0, tl - 1) + "Z"; 
else if (dl < tl)
    return date + template.substring(dl);
return date;
...