Java Utililty Methods String Capitalize

if (isAlpha(str.charAt(0))) {
    return str.substring(0, 1).toUpperCase() + str.substring(1);
} else
    return str.charAt(0) + str.substring(1, 2).toUpperCase() + str.substring(2);

String[] parts = str.toLowerCase().split(" ");
StringBuilder buf = new StringBuilder();
for (String part : parts) {
    buf.append(part.substring(0, 1).toUpperCase() + part.substring(1) + " ");
if (buf.length() > 1) {
    return buf.toString().trim();
} else {
...

if (str == null || str.length() < 1)
    return str;
return str.substring(0, 1).toUpperCase() + str.substring(1);

Capitalizes all the whitespace separated words in a String.

return capitalize(str, null);

StringBuilder sb = new StringBuilder(str);
String firstChar = sb.substring(0, 1);
String upperFirstChar = firstChar.toUpperCase();
sb.delete(0, 1);
sb.insert(0, upperFirstChar);
return sb.toString();

if (str == null || str.length() == 0) {
    return str;
StringBuilder sb = new StringBuilder(str.length());
sb.append(Character.toUpperCase(str.charAt(0)));
sb.append(str.toLowerCase().substring(1));
return sb.toString();

Capitalizes a String changing the first letter to title case as per Character#toTitleCase(char) .

int strLen;
if (str == null || (strLen = str.length()) == 0) {
    return str;
return new StringBuffer(strLen).append(Character.toTitleCase(str.charAt(0))).append(str.substring(1))
        .toString();

String capitalized = str;
if (str == null || str.isEmpty()) {
    return capitalized;
capitalized = String.valueOf(str.charAt(0)).toUpperCase() + str.substring(1);
return capitalized;

return changeFirstCharacterCase(str, true);

return changeFirstCharacterCase(str, true);