检查文本是否不是Questio类型，并且还包含一些特定的单词

Question

I want to make sure that the text is not a question type and also contains at least one of these:watch live watch speech live #breaking #breaking news

so I wrote the code as follow:

private static void containsQuestion(String commentstr){
     String urlPattern = "^(?!.*?\\?)(watch live|watch speech live|#breaking|#breaking news)";
     Pattern p = Pattern.compile(urlPattern,Pattern.CASE_INSENSITIVE);
        Matcher m = p.matcher(commentstr);
        if (m.find()) {
            System.out.println("yes");
        }
}

but when I try it with for example:

They say 2's company; is 3 a crowd watch live on...

I expect to see yes in the console since it is matched but nothing happens Why?

Answer 1

Problem is your use of start anchor ^ ,

Either remove it:

String urlPattern = 
        "(?!.*?\\?)(watch live|watch speech live|#breaking|#breaking news)";

Or place .*? before your keywords to match any # of chars before your phrases:

String urlPattern =
       "^(?!.*?\\?).*?(watch live|watch speech live|#breaking|#breaking news)";

Due to use of ^ your regex is trying to match all those phrases only at start.

Answer 2

You need to allow more characters before/after you key words: Try this:

/^(?!.*?\?).*(watch live|watch speech live|\#breaking|\#breaking news).*/gm

https://regex101.com/r/uS1xQ4/2