Regex allowing a space character in Java

Question

Hey all, so I\'m trying to allow some text input which goes through a regex check before it\'s sent off. I want the text to only include A-Z, 0-9, and the space \" \" charac

Answer 1

\s allows for any ASCII whitespace character. Consider using that rather than " ".

if(!title.matches("[a-zA-Z0-9_\s]+")) {
    //fail
}
else {
    //success
}

Answer 2

You're not including the space in the Regex. Try the following:

if (!title.matches("[a-zA-Z0-9 ]+"))