Regex to match ASCII non-alphanumeric characters

Question

I need a regex to match ASCII non-alphanumeric characters. The regex should not match non-ASCII characters. I am using the following:

   "[\\u0000-\\u002f\\u003a-\\u0040\\u005b-\\u0060\\u007b-\\u007f]"

Can I simplify this regex ?

Answer 1

Yes you can use a character class intersection. Example:

[\\p{ASCII}&&\\P{Alnum}]

This means: intersection between all ascii characters and all non alphanumeric characters