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Editorial Team
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Asked: 2026-05-22T20:26:53+00:00

The following will replace ASCII control characters (shorthand for [\x00-\x1F\x7F] ): my_string.replaceAll(\\p{Cntrl}, ?); The

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The following will replace ASCII control characters (shorthand for [\x00-\x1F\x7F]):

my_string.replaceAll("\\p{Cntrl}", "?");

The following will replace all ASCII non-printable characters (shorthand for [\p{Graph}\x20]), including accented characters:

my_string.replaceAll("[^\\p{Print}]", "?");

However, neither works for Unicode strings. Does anyone has a good way to remove non-printable characters from a unicode string?

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1 Answer

  1. Editorial Team
    my_string.replaceAll("\\p{C}", "?");

    See more about Unicode regex. java.util.regexPattern/String.replaceAll supports them.

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