Regex expression

[ms raaghu]

Hi,

I have a string say "ABC++SXR++DUMMY.png" its a file name here, i need to split the string with the delimiter '++' so i have done it in a simple way i.e.

String[] strFileNameList = strFileName.split(//++);

which gives me an array containing [ABC,SXR,DUMMY.png] here, i want like [ABC,SXR,DUMMY] without the extension part. What would be the regex for achieving the same or should i be doing again the substring on it to remove the .ext from the list?

Please suggest

[Richard Tookey]

It would be possible to do it as part of the split but I would remove the extension before the split.

That line of code cannot be the line you are using since the regex does not have quotes round it and you should be using "\\" and not "//" ! Also, if you did use "\\++" this would split

     String strFileName = "ABC+SXR+++++++DUMMY.png";

into the same set of values as

     String strFileName = "ABC++SXR++DUMMY.png";

Is that what you want?

[ms raaghu]

Thanks,

How would you remove the extension, is that like doing the substring till "." or how?

cant regex be applied to extract the string till the .ext? so that the result would be achieved at a shot

Please suggest

[Richard Tookey]

ms raaghu wrote:
How would you remove the extension, is that like doing the substring till "." or how?

cant regex be applied to extract the string till the .ext? so that the result would be achieved at a shot

Please suggest

I would probably use String.replaceFirst() but if you are new to regex you might find it easier to use String.lastIndexOf('.') and String.substring().

[surlac surlacovich]

ms raaghu wrote:I have a string say "ABC++SXR++DUMMY.png" ..., i want like [ABC,SXR,DUMMY]

The expression:

"ABC++SXR++DUMMY.png".split("((\\+)+|((\\.([^\\s]+)))$)")

will give you strings separated by any number of "+" or file extension.

[ms raaghu]

Thanks surlac,

it worked skipping . part successfully.

[Khuzema Dharwala]

Try this as well

String[] strFileNameList=strFileName.split("[^A-Z]");

Thanks...

[Mike Simmons]

The original poster hasn't been answering the questions that have been asked, so I don't think we really know the requirements. However, the original question said that '++' was the delimiter, suggesting that the number of + signs is not arbitrary, and a single '+' should not be considered a delimiter. If that's the case, then the correct regex would be

String[] strFileNameList = strFileName.split("\\+\\+");

[surlac surlacovich]

Khuzema Dharwala wrote:

String[] strFileNameList=strFileName.split("[^A-Z]");

Have you run this code by yourself?
In this case any number will be as a delimiter. Also double ++ makes redundant empty strings because it doesn't recognize ++ as a single delimiter (it is 2 separate delimiters).
Also, what if extension is in upper case?