Java Utililty Methods String Capitalize

if (isEmpty(s)) {
    return s;
return Character.toTitleCase(s.charAt(0)) + s.substring(1);

if (s == null)
    return new String();
switch (s.length()) {
case 0:
    return new String();
case 1:
    return s.toUpperCase();
default:
...

if (s == null || s.length() == 0)
    return s;
return Character.toUpperCase(s.charAt(0)) + s.substring(1);

char first = s.charAt(0);
return Character.isTitleCase(first) ? s : Character.toTitleCase(first) + s.substring(1);

if (s == null || s.isEmpty())
    return s;
char first = s.charAt(0);
if (Character.isLetter(first) && Character.isLowerCase(first))
    return Character.toUpperCase(first) + s.substring(1);
else
    return s;

String[] split = s.split("_");
String result = "";
for (int i = 0; i < split.length; i++) {
    if (i != 0) {
        result += " " + split[i].substring(0, 1).toUpperCase() + split[i].substring(1);
    } else {
        result += split[i].substring(0, 1).toUpperCase() + split[i].substring(1);
return result;

if (Character.isLowerCase(s.charAt(0))) {
    return Character.toUpperCase(s.charAt(0)) + s.substring(1);
} else {
    return s;

if (isNullOrEmpty(s))
    return EMPTY;
StringBuilder out = new StringBuilder(s.length());
out.append(Character.toUpperCase(s.charAt(0)));
if (s.length() > 1)
    out.append(s.substring(1).toLowerCase());
return out.toString();

String result = s;
if ((s != null) && (s.length() > 0) && Character.isLowerCase(s.charAt(0))) {
    char[] chars = s.toCharArray();
    chars[0] = Character.toUpperCase(chars[0]);
    result = new String(chars);
return result;

if (s == null) {
    return null;
String[] words = s.split(" ");
StringBuffer buffer = new StringBuffer();
for (String word : words) {
    if (buffer.length() > 0) {
        buffer.append(' ');
...