import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = ".*\\.(\\w{3,})$";
final String string = "http://www.w3schools.com/jsref/jsref_regexp_exec.asp\n"
+ "https://translate.google.com/#en/pt/Thank%20you%20Engr!%20That%20is%20awesome.php\n"
+ "www.facebook.com/index.asp";
final String subst = "$1";
final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE | Pattern.CASE_INSENSITIVE);
final Matcher matcher = pattern.matcher(string);
// The substituted value will be contained in the result variable
final String result = matcher.replaceAll(subst);
System.out.println("Substitution result: " + result);
}
}
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