ASCII char check using regex(java)

Question

I have a string like message = "ASDF rfghy !@#$ :>< "

I want to check this string contain ASCII value between 0 to 255 using regex(java).

Answer 1

You can try the regex:

"^\\p{ASCII}*$"

Answer 2

In regex, \x00 matches the hex character 00 and character classes work on these. So you can do:

/^[\x00-\x7F]+$/

to match a string of one or more ascii values.

Answer 3

Just use this code to do this check:

System.out.println("Matches: " + message.matches("[\u0000-\u00FF]+"));