Breaking Strings into chars that are in upper case

Question

I\'m making a method to read a whole class code and do some stuff with it.

What I want to do is get the name of the method, and make a String with it.

Someth

Answer 1

You can use a regular expression to split the name into the various words, and then capitalize the first one:

public static void main(String[] args) {
    String input = "removeProduct";

    //split into words
    String[] words = input.split("(?=[A-Z])");

    words[0] = capitalizeFirstLetter(words[0]);

    //join
    StringBuilder builder = new StringBuilder();
    for ( String s : words ) {
        builder.append(s).append(" ");
    }

    System.out.println(builder.toString());

}

private static String capitalizeFirstLetter(String in) {
    return in.substring(0, 1).toUpperCase() + in.substring(1);
}

Note that this needs better corner case handling, such as not appending a space at the end and handling 1-char words.

Edit: I meant to explain the regex. The regular expression (?=[A-Z]) is a zero-width assertion (positive lookahead) matching a position where the next character is between 'A' and 'Z'.