Java RegEx匹配任何内容但是文字字符串'NIL'或'nil'

^(?!NIL|nil).*$

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class RegexExample {
   public static void main(String[] args) {
      String input = "hello world, NIL is here";
      Pattern pattern = Pattern.compile("^(?!NIL|nil).*$");
      Matcher matcher = pattern.matcher(input);
      if (matcher.find()) {
         System.out.println("The input string matches the pattern.");
      } else {
         System.out.println("The input string does not match the pattern.");
      }
   }
}