java - Allow string contains specific char from string -


i want check string if contains specific char string.

how can in java?

thank you.

example:

string inputstring =hi, how you?"; string allowchar ="abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz,.?!0123456789 ";

use : inputstring.matches("["+allowchar+"]+") check if inputstring contains characters mentioned in allowchar tring


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