I need to create a regular expression to validate a Camelcase

Question

Good morning to everyone, I hope you can help me. I need a regex or even an idea of how to insert a space for Camelcase expressions. In other words, insert a space for each uppercase letter of the word. Java...

Answer 1

Regex : /[A-Z]/g

This way you can find all the uppercase.

Testing

So in code you can use something like:

String s = "TudoMaiúsculoSemEspaçoQuemFezIsso";
StringBuilder out = new StringBuilder(s);
Pattern p = Pattern.compile("[A-Z]");
Matcher m = p.matcher(s);
int extraFeed = 0;
while(m.find()){
    if(m.start()!=0){
        out = out.insert(m.start()+extraFeed, " ");
        extraFeed++;
    }
}
System.out.println(out);