I need a method that can tell me if a String has non alphanumeric characters. For example if the String is "abcdef?" or "abcdefà", the method must return true.

Nov 9, 2022 · Anything that is a number or a letter is an alphanumeric character, so examples are punctuation and symbols: [, }, ~, /, *, @, and so on.

May 8, 2020 · Thus, to answer OP's question to include "every non-alphanumeric character except white space or colon", prepend a hat ^ to not include above characters and add the colon to that, and …

Apr 10, 2024 · Non-alphanumeric characters on the keyboard are those that are neither alphabetic nor numeric. Examples are commas, underscores, colons and semicolons.

Mar 7, 2012 · It does not enforce that the string contain only non-letters. If you must ensure that no non-letter characters are matched, anchor the regex like ^[^A-Za-z]+$ -- I think that's what you are …

Oct 3, 2023 · Any character which is not A-Z or 0-9. Examples of non-alphanumeric characters: !"£$%^&* ()

Apr 8, 2015 · I'm looking for a regex expression that will check and make sure that at a word or sentence does not contain non alphanumeric characters except spaces, dashes, apostroph, letters, numbers …

Aug 21, 2012 · In this case, you are explicitly disallowing backslashes in your password and allowing any combination with at least one non-alphabetic character otherwise. The expression above will …

Why don't you just use alphanumeric (i.e. [0-9a-zA-Z]) characters? With long enough passwords, you do not need more. If you really want more, you can use the list of the 95 printable ASCII characters.

Mar 17, 2014 · 0 Special characters and Alpha numeric characters belongs to two different sets (categories). The link you specified itself says: In computers designed for English language users, …