import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Example {
public static void main(String[] args) {
final String regex = "^[ ]+(*SKIP)(*FAIL) # match spaces at the beginning of a line\n"
+ " # these shall fail\n"
+ "| # OR\n"
+ "[ ]{2,} # at least two spaces";
final String string = "One OS to rule them all,\n"
+ " One OS to find them.\n"
+ " One OS to call them all,\n"
+ " And in salvation bind them.\n"
+ " In the bright land of Linux,\n"
+ " Where the hackers play.";
final String subst = "";
final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE | Pattern.COMMENTS);
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