Question

I have a dictionary file containing lines
ns*.abc.com
ns*.xyz.com
I want to match patterns such as ns15.abc.com, nsABC.abc.com with the dictionary file and return true.
E.g. ns15.abc.com is match while ns16.ABC.abc.com is not a match.
Thanks in advance

public class ValidateDemo {  
    public static void main(String[] args) {  
    List<String> input = new ArrayList<String>();  

    input.add("ns14.abc.com");
    for (String str : input) {
        if (str.matches("ns*.abc.com")) {
            System.out.println("Match: " + str);
        }
    }
}
}

Answer 1

In each entry from the dictionary, replace asterisk by "[^\.]*" and dot by "\." – there’s your pattern for each individual entry:

    Pattern p = Pattern.compile("^" + dictEntry.replaceAll(".", "\\.").replaceAll("*", "[^\\.]*") + "$");

Or you can also join all dictionary entries with “|” to have single pattern matching them all.