Use re.match() to verify a string only contains letters, numbers, underscores, and dashes ... Call re.match(pattern, string) with the pattern ^[A-Za-z0-9_-]*$ to check if ...
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java-check-if-string-contains-only-letters-and-numbers
Aug 28, 2009 — I checked this in Eclipse and though the string has only characters if ... an exact number of characters.. match a minimum or maximum number .... Nov 1, 2015 — 4 Answers · Use regular expressions : Pattern pattern = Pattern.compile("\\p{​Alnum}+"); Matcher matcher = pattern.matcher(name); if (!matcher. · for ... 939c2ea5af