Regex pattern including all special characters

Question

I want to write a simple regular expression to check if in given string exist any special character. My regex works but I don\'t know why it also includes all numbers, so wh

Answer 1

You can use a negative match:

Pattern regex = Pattern.compile("([a-zA-Z0-9])*"); (For zero or more characters)

or

Pattern regex = Pattern.compile("([a-zA-Z0-9])+"); (For one or more characters)