dd and yyyy-MMM-dd cases in java through regex or in simple way

Asked Jan 31 '16 at 13:57

Active Jan 31 '16 at 14:10

Viewed 102 times

i have the below method signature in which there are two different parameters out of which there is one parameter named dateStr, now inside dateStr variable there can be multiple date formats for example following are the values that can be inside dateStr variable

21/02/2014
05/25/2014
05/12/16
2016/12/26  (YYYY/MM-dd)   ****//check this pattern format  *******
2014-JAN-04 (YYYY-MMM-dd)   ****//check this pattern format ********

below is the method code signature

public java.util.Date extractDate(String dateStr, String dateType) {
}

now for the patterns like

(YYYY/MM-dd) and (YYYY-MMM-dd) i have two handle these two patterns specially ignoring the rest other patterns so what i have come up with these if block

if (!dateStr.equals("YYYY-MM-dd" && "YYYY/MM-dd")) {
    // code
}
else
{
//***** handle YYYY-MM-dd && YYYY/MM-dd *** here 
}

please advise is it correct way or i can add any regex here also

edited Jan 31 '16 at 14:10

asked Jan 31 '16 at 13:57

sss

`dateStr.equals("YYYY-MM-dd" && "YYYY/MM-dd")`? – SatyaTNV Jan 31 '16 at 13:58
@Satya for these two date formats i have to do something in my code but how could i check that the string value in the variable dateStr is of YYYY-MM-dd or YYYY/MM-dd format – sss Jan 31 '16 at 13:59
if(dateStr.equals(firstFormat) || dateStr.equals(secondFormat)){ //correct format } – Balaji Krishnan Jan 31 '16 at 14:00
@BalajiKrishnan: *equals*? – Hovercraft Full Of Eels Jan 31 '16 at 14:01
@BalajiKrishnan i still not get it could you please show in code as I have done – sss Jan 31 '16 at 14:01
sss, I'm not sure that he gets it either as this is not where you'd use a test for equality. You could create two SimpleDateFormat objects and try to parse with one, and if it throws an exception, try to parse with the second. – Hovercraft Full Of Eels Jan 31 '16 at 14:04
@HovercraftFullOfEels completely agree with you please – sss Jan 31 '16 at 14:04
@HovercraftFullOfEels i am looking for more robust expression that is the regex one – sss Jan 31 '16 at 14:10
Again, test with multiple SimpleDateFormat objects as outlined in duplicate. Don't use regex for this. – Hovercraft Full Of Eels Jan 31 '16 at 14:10
Thanks but a small request please can you show a little it in code as I have done that will help me to grasp ore – sss Jan 31 '16 at 14:27
The duplicate will show you answers that have code with them. – Hovercraft Full Of Eels Jan 31 '16 at 15:01
There is no answer for yyyy-MM-dd format pls – sss Jan 31 '16 at 15:11

handling yyyy/mm/dd and yyyy-MMM-dd cases in java through regex or in simple way

0 Answers0