FIlter list of strings by regex extracting the matches

Script

List split = new ArrayList();
if (!string.equals("")) {
	String regexString = ",";
	if (regex != void) {
		regexString = regex;
	}
	String[] result = string.split(regexString);
	for (int i = 0; i < result.length; i++) {
		split.add(result[i]);
	}
}

Script

import java.util.regex.*;

filteredlist = new ArrayList();
Pattern thePat = Pattern.compile(regex);
int theGroup = Integer.parseInt(group);

for (Iterator i = stringlist.iterator(); i.hasNext();) {
	String item = (String) i.next();
	Matcher matcher = thePat.matcher(item);

	if (matcher.find()) {
		filteredlist.add(matcher.group(theGroup));
	}
}

Value

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