Split string using regular expression java

[Gershwin Yesudhas]

Hi,

I have requirement to split a string based on Regular expression which will be of the below format.

There are 3 different type of String values -

ABC_1234_XL.jpg

XYZ_7890_SM.jpg

PQ_R_4567_LG.jpg

in the above ABC, XYZ and PQ_R are 3 types of image types which I want to extract separately and compare it with respective list of corresponding Types fetched from DB.
So in case if I go with normal split by underscore "_", then it flunks the purpose while splitting the 3rd string.

So I need a solution to split these string based on Regular expression, where every time the center element will [0-9] and the left would be Image Type and the right would be Image Size.
Meaning - ImageType_ImageTypeID_ImageSize. We need to split this having the center element (imageTypeID) as base and get the left & right date by excluding the "_".
How to achieve this with Split along with Regex?

Help please and let me know in case if you need more info.

[fred rosenberger]

Any time someone says "How do I do A with B", it makes me cringe. Maybe B is the right way to do it, but maybe not:

How do I turn a screw using water?
How do I sleep using the space shuttle?
How do I mow my lawn using China?

now...having said that....

if the middle part is ALWAYS underscore numbers underscore...

couldn't you set up your regex as (this is off the top of my head, not tested)

(^.*)(_[0-9]+_)(.*$)

I think that will give you three parts...

the middle will give you _1234_, _7890_, and _4567_. The other parens will give you the beginning and the end. Then you can chop the underscores off the middle piece as a separate step.

edit - you may even be able to move the underscores outside the parens and do it in one step...

(^.*)_([0-9]+)_(.*$)

[Gershwin Yesudhas]

Fred,

More than your answer, I liked the intial part much.. was ROFLing.
thanks for that lighter notation their.

Your regex seems to be an understandably working thing.
Will try it out though.
Thanks man.

Others / Fred even, If you guys have any other suggestion too, please feel free.
Many thanks.

[Gershwin Yesudhas]

Hi,

Can you please help with how to split the Regex and assign it to specific string variables?
The regex which need to be split and assigned to 3 different string variables ---> (^.*)(_[0-9]+_)(.*$)

Please help.

thanks,
Gershwin

[fred rosenberger]

I've never done it in java, but the String.split() method does return a String Array. I would assume the pieces would be in there...but haven't tried or confirmed it.

[Gershwin Yesudhas]

That's ok Fred.
Thanks anyway.

Let's see if someone has any idea about this.


Regards,
Gershwin

[fred rosenberger]

Or you could try it out and see for yourself!!! That's the best way to learn, after all...