String Reading Problem

[akhter wahab]

hey guys here is the code

  Pattern abc = Pattern.compile("([A-Z\\d]{2}\\s+\\d+)");

i am not understanding what does actually "([A-Z\\d]{2}\\s+\\d+)" this string is doing please guide me to understand this

[Hunter McMillen]

This is a pretty good website on regex to provide you with some guidance:
http://www.regular-expressions.info/

As to your specific question, break it down into parts.

What does this part match?

Pattern p = Pattern.compile("([A-Z\\d])");

Now what does this part match?

Pattern p = Pattern.compile("(\\s+\\d+)");

It's pretty confusing when you try to look at it as a whole, but when you break it down into parts it's much simpler. You can test your patterns for matches using the java.util.regex.Matcher class.

example:

    
Pattern  p = Pattern.compile("[A-Za-z0-9_]*");
Matcher m = p.matcher("Hello998");
boolean b = m.matches();
System.out.println("Are there matches? " + b);

Hunter

[Campbell Ritchie]

The Java™ Tutorials section is another good resource about regular expression.

[john chris]

you could read java.util.regex.Pattern.class

[akhter wahab]

i actually wants to know what

Pattern abc = Pattern.compile("([A-Z\\d]{2}\\s+\\d+)");
			Matcher matcher0 = abc.matcher(r.getValueAttribute());    

pattern.compile and abc.matcher do...

[Rob Spoor]

Then check out the Javadoc of java.util.regex.Pattern.

[Campbell Ritchie]

Rob Prime wrote:Then check out the Javadoc of java.util.regex.Pattern.

Akhter Wahab, somebody else has already referred you to that class. Did you read the links quoted earlier?

[akhter wahab]

Campbell Ritchie wrote:

Rob Prime wrote:Then check out the Javadoc of java.util.regex.Pattern.

Akhter Wahab, somebody else has already referred you to that class. Did you read the links quoted earlier?

sorry Campbell Ritchie i didn't... now i got it

thanks