Question

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();

Answer 1

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);
}