Question

I am trying to match input data from the user and search if there is a match of this input.
for example if the user type : A*B*C*
i want to search all word which start with A and contains B and B
i tried this code and it;s not working:(get output false)

public static void main(String[] args)
    {

        String envVarRegExp = "^A[^\r\n]B[^\r\n]C[^\r\n]";
        Pattern pattern  = Pattern.compile(envVarRegExp);
        Matcher matcher = pattern.matcher("AmBmkdCkk");
        System.out.println(matcher.find());

    }

Thanks.

Answer 1

I thing you should use * modifier in your regex like this (for 0 or more matches between A & B and then between B & C):

String envVarRegExp = "^A[^\r\n]*B[^\r\n]*C";

EDIT: It appears that you’re working off the input coming from your user where user can use asterisk * in inputs. If that is the case consider this:

String envVarRegExp = userInput.replace("*", ".*?");

Where userInput is String like this:

String userInput = "a*b*c*d*e";