RE and Jar are hard to Google for!

[Phlip]

Java-istas:

"Re" is a common prefix for post subjects, and "jar" is a cylindrical
open-mouthed kitchen vessel. I can't Google for what library to add to
my project to get Regular Expressions, in Java (which is an island
with a really cool temple on it, Borubador).

Apologies for the helplessly newbescent question, but how do I get
RegExps around here?

 

[Skip Hollowell]

http://www.google.com/search?hl=en&ie=UTF-8&oe=UTF-8&q="regular+expression"+jar+java&spell=1
Search on
"Regular Expression" java jar
and you will see jakarta has a jakarta-regexp.jar and
jakarta-regexp-package.jar files for ya. Happy Parsing.

Skip.

 

[Phlip]

Search on
"Regular Expression" java jar
and you will see jakarta has a jakarta-regexp.jar and
jakarta-regexp-package.jar files for ya. Happy Parsing.

<screaming>Do you mean to tell me that Java has spent the last 8 years
contending with Perl for the Number One Web Language niche WITHOUT a native
RegExp library???</screaming>

<tiny_little_voice> thanks for the linkie... </tiny_little_voice>

 

[Marco Schmidt]

Phlip:

[...]

Apologies for the helplessly newbescent question, but how do I get
RegExps around here?

There is java.util.regex in the runtime library.

The most obvious search terms are Java regular expressions. That leads
to tutorials and standalone libraries.

If you use Google directory you even find a dedicated category:
<http://directory.google.com/Top/Computers/Programming/Languages/Regular_Expressions/Java/>.

Regards,
Marco

 

[Phlip]

There is java.util.regex in the runtime library.

What I can't figure is why JUnit doesn't have assertMatch().

The only Googling for 'JUnit assertMatch' I done found used RE instead of
regex.

So here's the version using the most-standard library:

import java.util.regex.Pattern;
....
private void assertMatch(String regex, String input) throws Exception
{
boolean shouldMatch = Pattern.matches(regex, input);
assertTrue("<" + regex + "> should match <" + input + ">", shouldMatch);
}

None of this is a technical question anymore - thanks guys.

 

[Phlip]

So here's the version using the most-standard library:

import java.util.regex.Pattern;
...
private void assertMatch(String regex, String input) throws Exception
{
boolean shouldMatch = Pattern.matches(regex, input);
assertTrue("<" + regex + "> should match <" + input + ">", shouldMatch);
}

Now what if I called that like this:

String patter = "(happy){2} (joy){2}";
assertMatch(patter, getRenState());

Now what if I want the console, at fault time, to display this:

(patter)<(happy){2} (joy){2}> should match
(getRenState())<You fat, bloated eediot!>

To put the names of the source expressions into the console, we must get
them from the source of the calling method. How?

(Flame: C++ can do this with the mighty stringerizer operator..)

 

[Dale King]

<screaming>Do you mean to tell me that Java has spent the last 8 years
contending with Perl for the Number One Web Language niche WITHOUT a native
RegExp library???</screaming>

No, Java spent the first 6-7 years of its life without a regular expression
library as part of its core library. For the past year and a half it has had
one in java.util.regex. Before that you had to use one of the many freely
available third party ones. Personally I would recommend the Jakarta ORO
project over the regexp project.

 

[Dale King]

What I can't figure is why JUnit doesn't have assertMatch().

Because then it would not be compatible with pre-1.4 VM's or else require a
third party library.