Java Utililty Methods String Capitalize First

final char[] first = s.toCharArray();
if (Character.isLetter(first[0])) {
    first[0] = Character.toUpperCase(first[0]);
    return new String(first);
return s;

return variableName.substring(0, 1).toUpperCase() + variableName.substring(1);

char firstLetter = Character.toTitleCase(data.substring(0, 1).charAt(0));
String restLetters = data.substring(1);
return firstLetter + restLetters;

Capitalize the first letter but leave the rest as they are.

String firstLetter = data.substring(0, 1).toUpperCase();
String restLetters = data.substring(1);
return firstLetter + restLetters;

char firstChar = data.charAt(0);
char titleCase = Character.toTitleCase(firstChar);
if (firstChar == titleCase) {
    return data;
StringBuilder result = new StringBuilder(data.length());
result.append(titleCase);
result.append(data, 1, data.length());
...

if (message == null || message.length() == 0) {
    return message;
char firstUpperCaseLetter = Character.toUpperCase(message.charAt(0));
String remainderOfMessage = message.substring(1);
return firstUpperCaseLetter + remainderOfMessage;

if (name == null)
    return null;
String firstLetter = name.substring(0, 1);
String remainder = name.substring(1);
String capitalized = firstLetter.toUpperCase() + remainder.toLowerCase();
return capitalized;

char[] chars = s.toLowerCase().toCharArray();
for (int i = 0; i < chars.length; i++) {
    char ch = chars[i];
    if (Character.isLetter(ch)) {
        chars[i] = Character.toUpperCase(ch);
        break;
return new String(chars);

char[] chars = s.toCharArray();
chars[0] = Character.toUpperCase(chars[0]);
return new String(chars);

if (s == null || s.isEmpty())
    return s;
return s.length() == 1 ? s.toUpperCase() : s.substring(0, 1).toUpperCase() + s.substring(1);