A Simple Regular Expression...

[mrashi12]

Hey, im new to RegEx. Lets suppose I have the following:

import java.util.regex.*;
public class RegexValidation {
public static void main (String[]args){
String RE1="\\+?[0-9]* ?(\\(0\\))?[0-9. ]{7,}";
String RE2="\\w[-.\\w]*@\\w[-\\w]*\\.\\w[-.\\w]*";
String RE3="\\w[-,. \\w]*";
String RE4="[A-Z]{1,2}[0-9R][0-9A-Z]? [0-9][A-Z-[CIKMOV]]{2}";

//code here...?
}
}

I need to validate these contact details using the regular expressions int he String's. The question is:

content-manager@bradford.ac.uk
University of Bradford
Bradford, West Yorkshire
BD7 1DP
UK
+44 (0)1274 232323

(i) Find the number of matches for each of the regular expressions RE1-4, taking as input-strings whole lines in the contact details given above.

(ii) Suggest how to rename the regular expressions RE1-4 to indicate which details they validate, e.g. rename RE3 to EMAIL_RE (check!).

If you could please help me out, would be kind of you. Thank you :)

[Fubarable]

Help you out -- how? You haven't told us where exactly you're stuck.

[mrashi12]

on the first question of writing code:

(i) Find the number of matches for each of the regular expressions RE1-4, taking as input-strings whole lines in the contact details given above.
Firstly, what is "RE1-4" ?

[diamonddragon]

Reference variables of String type.

[Fubarable]

Reference variables of String type.

Meaning what exactly? I'm not sure how this relates to the original question.

[Fubarable]

on the first question of writing code:

(i) Find the number of matches for each of the regular expressions RE1-4, taking as input-strings whole lines in the contact details given above.
Firstly, what is "RE1-4" ?

RE1-4 refers to the 4 String constants that are to be used as regular expressions, RE1, RE2, RE3, and RE4. You're to use them to validate the input.

[mrashi12]

ok I misread "each" lol, and how do I now actually find the number of matches for each of these regular expressions taken as input strings whole lines in the following contacts:
content-manager@bradford.ac.uk
University of Bradford
Bradford, West Yorkshire
BD7 1DP
UK
+44 (0)1274 232323

and also how would I rename the regular expressions RE1-4 to indicate which details they validate please?

[Fubarable]

ok I misread "each" lol, and how do I now actually find the number of matches for each of these regular expressions taken as input strings whole lines in the following contacts:

The Java regular expressions tutorials shows you how to use a while loop to iterate through and "find()" each match.

and also how would I rename the regular expressions RE1-4 to indicate which details they validate please?

First do the first part of the assignment to see what each regex matches. Then use that information to rename them.

[mrashi12]

Thank you very much!

[diamonddragon]

Meaning what exactly? I'm not sure how this relates to the original question.

Well I'm trying to inspire OP rather than giving full answer.

P.S. What does OP mean?

[Fubarable]

@diamonddragon:
OP means "original poster" or the "original post".

@mrashi12:
You're welcome!