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

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 skeet -> Jon Skeet

miles o'Brien -> Miles O'Brien (B remains capital, this rules out Title Case)

old mcdonald -> Old Mcdonald *

*( Old McDonald would be find too, but I don't expect it to be THAT smart.)

A quick look at the Java String Documentation reveals only toUpperCase() and toLowerCase() , which of course do not provide the desired behavior. Naturally, Google results are dominated by those two functions. It seems like a wheel that must have been invented already, so it couldn't hurt to ask so I can use it in the future.

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WordUtils.capitalize(str) (from apache commons-text)

(Note: if you need "fOO BAr" to become "Foo Bar" , then use capitalizeFully(..) instead)

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如果你只是担心第一个字母大写的第一个字母：

private String capitalize(final String line) {
   return Character.toUpperCase(line.charAt(0)) + line.substring(1);
}

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以下方法将所有字母转换为大写/小写，具体取决于它们在空间或其他特殊字符附近的位置。

public static String capitalizeString(String string) {
  char[] chars = string.toLowerCase().toCharArray();
  boolean found = false;
  for (int i = 0; i < chars.length; i++) {
    if (!found && Character.isLetter(chars[i])) {
      chars[i] = Character.toUpperCase(chars[i]);
      found = true;
    } else if (Character.isWhitespace(chars[i]) || chars[i]=='.' || chars[i]==''') { // You can add other chars here
      found = false;
    }
  }
  return String.valueOf(chars);
}

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