Java Utililty Methods String Lower Case

String toLowerCase(Enum aEnum)
to Lower Case

if (aEnum == null) {
 return null;
return toLowerCase(aEnum.name());

byte toLowerCase(final byte b)
to Lower Case

if (b < 'A' || b > 'Z') {
 return b;
return (byte) (b - UPPER_CASE_OFFSET);

String toLowerCase(final String s)
to Lower Case

return hasUpperLetter(s) ? s.toLowerCase() : s;

String toLowerCase(final String s)
Retrieves an all-lowercase version of the provided string.

if (s == null) {
 return null;
final int length = s.length();
final char[] charArray = s.toCharArray();
for (int i = 0; i < length; i++) {
 switch (charArray[i]) {
 case 'A':
...

String toLowerCase(final String s)
GWT 1.5.3 does not support Locale in String toLowerCase.

return s.toLowerCase();

String toLowerCase(final String s)
Converts a string to lower case letters

return s == null ? null : s.toLowerCase();

String toLowerCase(final String str)
to Lower Case

return str != null ? str.toLowerCase() : null;

String[] toLowerCase(final String[] strings)
to Lower Case

String[] lowerCaseStrings = new String[strings.length];
for (int i = 0; i < strings.length; i++) {
 lowerCaseStrings[i] = strings[i].toLowerCase();
return lowerCaseStrings;

void toLowerCase(final StringBuilder src)
Converts all of the characters in src to to lower case using the rules of the default locale.

for (int i = 0; i < src.length(); i++) {
 src.setCharAt(i, Character.toLowerCase(src.charAt(i)));

int toLowercase(int codePoint)
Convert upper case letters to lower case letters in ASCII

if (codePoint >= 0x41 && codePoint <= 0x5A) {
 return codePoint + 32;
return codePoint;