Regex for checking if a string is strictly alphanumeric

Question

How can I check if a string contains only numbers and alphabets ie. is alphanumeric?

Answer 1

try this [0-9a-zA-Z]+ for only alpha and num with one char at-least..

may need modification so test on it

http://www.regexplanet.com/advanced/java/index.html

Pattern pattern = Pattern.compile("^[0-9a-zA-Z]+$");
Matcher matcher = pattern.matcher(phoneNumber);
if (matcher.matches()) {

}