Java Utililty Methods String Camel Case

StringBuilder sb = new StringBuilder();
boolean start = true;
for (CharSequence comp : components) {
    if (comp != null && comp.length() == 0) {
        if (start) {
            sb.append(comp);
            start = false;
        } else {
...

if (input.contains(" ")) {
    final String[] strings = input.split(" ");
    final StringBuilder sb = new StringBuilder();
    for (final String s : strings) {
        sb.append(s.substring(0, 1).toLowerCase()).append(s.substring(1).toLowerCase()).append(" ");
    return sb.toString();
return input.substring(0, 1).toLowerCase() + input.substring(1).toLowerCase();

return prefix.toLowerCase() + str.substring(0, 1).toUpperCase() + str.substring(1).toLowerCase();

if (text == null) {
    throw new IllegalArgumentException("text");
for (final String acronym : ACRONYMS) {
    if (acronym.equals(text)) {
        return text;
for (final String acronym : ACRONYMS) {
    if (text.startsWith(acronym)) {
        return acronym.toLowerCase().concat(text.substring(acronym.length()));
return text.substring(0, 1).toLowerCase().concat(text.substring(1));

if (value == null || value.isEmpty()) {
    return "";
final StringBuilder result = new StringBuilder(value.length());
final String[] parts = value.split(delim);
if (parts != null && parts.length > 0) {
    boolean mustCapitalize = false;
    for (final String part : parts) {
...

StringBuffer newColumn = new StringBuffer();
boolean underScoreFound = false;
int index = -1;
int currentPosition = 0;
while ((index = column.indexOf('_', currentPosition)) > -1) {
    newColumn.append(column.substring(currentPosition, index).toLowerCase());
    newColumn.append(column.substring(index + 1, index + 2).toUpperCase());
    currentPosition = index + 2;
...

StringBuilder result = new StringBuilder();
int i = 0;
for (String word : content.replaceAll("[^a-zA-Z0-9]", " ").split(NATURAL_TEXT_SPLITTER)) {
    word = word.toLowerCase();
    if (i == 0) {
        result.append(word);
    } else {
        result.append(firstUpper(word));
...

return removeWhiteSpaces(capitalize(in.toLowerCase(), true));

String s = "";
String[] split = in.replace('_', ' ').split(" ");
for (int i = 0; i < split.length; i++) {
    if (i == 0)
        s += split[i].toLowerCase();
    else
        s += split[i].substring(0, 1).toUpperCase() + split[i].substring(1).toLowerCase();
return s;

return input.substring(0, 1).toLowerCase() + input.substring(1);