$ cat config.xml 
<?xml version="1.0"?>
<!DOCTYPE module PUBLIC
          "-//Puppy Crawl//DTD Check Configuration 1.3//EN"
          "https://checkstyle.org/dtds/configuration_1_3.dtd">
<module name="Checker">
  <module name="TreeWalker">
    <module name="UnnecessaryParentheses">
    </module>
  </module>
</module>

$ cat Test.java 
import java.util.Arrays;

public class Test
{
  public static void main(String[] args) {
    String[] a = { "s", "", "1", "", "" };
    Arrays.stream(a).filter(s -> !((boolean)s.isEmpty())).toArray(String[]::new); // should be violation
    Arrays.stream(a).filter(s -> !(boolean)s.isEmpty()).toArray(String[]::new);
  }
}

$ java -jar checkstyle-10.16.0-all.jar -c config.xml Test.java
Starting audit...
Audit done.