import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "^([ ])?\\[(\\/?)gaiarch(=[^\"]*)?]([ ])?|([ ])?\\[(\\/?)gaiarch(=[^\"]*)?]([ ])?$";
final String string = "[gaiarch=slider]\n"
+ "[img url=\"http://i1251.photobucket.com/albums/hh543/Knight-Yoshi/trade_c.png\" text=\"Trading Image\" goto=\"http://www.gaiaonline.com/gaia/bank.php?mode=trade&uid=15388423\"],[img url=\"http://i1251.photobucket.com/albums/hh543/Knight-Yoshi/friend_c.png\" text=\"Friends Image\" goto=\"http://www.gaiaonline.com/friends/add/15388423\"][/gaiarch]\n\n"
+ " [gaiarch=slider][img url=\"http://i1251.photobucket.com/albums/hh543/Knight-Yoshi/gaiaonline/thread/post/dark-center_bottom_zps419960f4.gif\" text=\"bottom bar\"]\n"
+ "[img url=\"http://i1251.photobucket.com/albums/hh543/Knight-Yoshi/gaiaonline/thread/post/star-say_right_zpsdc3769f3.png\" goto=\"http://www.gaiaonline.com/\"][/gaiarch] ";
final Pattern pattern = Pattern.compile(regex, Pattern.CASE_INSENSITIVE);
final Matcher matcher = pattern.matcher(string);
while (matcher.find()) {
System.out.println("Full match: " + matcher.group(0));
for (int i = 1; i <= matcher.groupCount(); i++) {
System.out.println("Group " + i + ": " + matcher.group(i));
}
}
}
}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Java, please visit: https://docs.oracle.com/javase/7/docs/api/java/util/regex/Pattern.html