CODEWITHSUNDEEP
javajodatime
CodingHero
CodingHero

Reputation: 3025

How can I extract a datetime pattern from any string in Java?

How can I extract a datetime pattern from any string in Java?

The pattern is "YYYYMMddkm".

Are there any Joda time helper methods for this?

String 1: 2014041507393_somefile.somemore

String 2: _somefile2014041507393.somemore

Upvotes: 3

Views: 1410

Answers (4)

user1803551
user1803551

Reputation: 13427

Use the parse method of SimpleDateFormat:

SimpleDateFormat format = SimpleDateFormat("YYYYMMddkm");
format.parse(string, pos);

Upvotes: 0

Josef E.
Josef E.

Reputation: 2219

First use regular expression and then parse string in Java for use later:

if (str.matches("\\d{4}-\\d{2}-\\d{2}")) {
     Date date = new SimpleDateFormat("yyyy-MM-dd", Locale.ENGLISH).parse(str);
    System.out.println(date); // Example: Sat May 14 00:00:00 BOT 2014
}

Upvotes: 0

Lucas
Lucas

Reputation: 3281

You will have to get rid of letters yourself. I don't think Joda time will have any methods to do this for you.

Upvotes: 0

Rafa Romero
Rafa Romero

Reputation: 2716

Use the following regular expression:

^\d{4}-\d{2}-\d{2}$

as in

String date = "2014041507393_somefile.somemore";

if (str.matches("\\d{4}-\\d{2}-\\d{2}")) {
    ...
}

Upvotes: 3

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