I have found this Regex extractor code in C#. Can someone tell me how this works, and how do I write the equivalent in Java?
// extract songtitle from metadata header.
// Trim was needed, because some stations don't trim the songtitle
fileName =
Regex.Match(metadataHeader,
"(StreamTitle=')(.*)(';StreamUrl)").Groups[2].Value.Trim();
This should be what you want.
// Create the Regex pattern
Pattern p = Pattern.compile("(StreamTitle=')(.*)(';StreamUrl)");
// Create a matcher that matches the pattern against your input
Matcher m = p.matcher(metadataHeader);
// if we found a match
if (m.find()) {
// the filename is the second group. (The `(.*)` part)
filename = m.group(2);
}
It pulls "MyTitle" from a string such as "StreamTitle='MyTitle';StreamUrl".
The () operators define match groups, there are 3 in your regex. The second one contains the string of interest, and is gotten in the Groups[2].Value.
There's a few very good regex designers out there. The one I use is Rad Software's Regular Expression Designer (www.radsoftware.com.au). It is very useful for figuring out stuff like this (and it uses C# RegEx's).
