How to capitalize the first character of each word in a string

Question

Is there a function built into Java that capitalizes the first character of each word in a String, and does not affect the others?

Examples:

• jon

Answer 1

I decided to add one more solution for capitalizing words in a string:

• words are defined here as adjacent letter-or-digit characters;
• surrogate pairs are provided as well;
• the code has been optimized for performance; and
• it is still compact.

Function:

public static String capitalize(String string) {
  final int sl = string.length();
  final StringBuilder sb = new StringBuilder(sl);
  boolean lod = false;
  for(int s = 0; s < sl; s++) {
    final int cp = string.codePointAt(s);
    sb.appendCodePoint(lod ? Character.toLowerCase(cp) : Character.toUpperCase(cp));
    lod = Character.isLetterOrDigit(cp);
    if(!Character.isBmpCodePoint(cp)) s++;
  }
  return sb.toString();
}

Example call:

System.out.println(capitalize("An à la carte StRiNg. Surrogate pairs: