Java Utililty Methods String Lower Case

List of utility methods to do String Lower Case

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Description

The list of methods to do String Lower Case are organized into topic(s).

Method

StringtoLowerCase(String text)
to upper case like xxx_xxx_xxx 
if (text != null && text.length() > 0) {
    StringBuilder sb = new StringBuilder();
    for (int i = 0; i < text.length(); i++) {
        char c = text.charAt(i);
        if (i != 0 && Character.isUpperCase(c)) {
            sb.append("_");
        sb.append(Character.toLowerCase(c));
...
StringtoLowerCase(String text)
to Lower Case 
if (null != text) {
    return text.toLowerCase();
return text;
StringtoLowerCase(String value)

Converts the given value to lower case. 

if (value == null) {
    return null;
return value.trim().toLowerCase();
StringtoLowerCase(String value)
to Lower Case 
return value != null ? value.toLowerCase() : value;
String[]toLowerCase(String[] strArr)
to Lower Case 
if (strArr == null)
    return null;
String[] res = new String[strArr.length];
for (int i = 0; i < strArr.length; i++) {
    res[i] = strArr[i].toLowerCase();
return res;
StringBuffertoLowerCase(StringBuffer buf)
to Lower Case 
int len = buf.length();
for (int i = 0; i < len; i++) {
    char lc = buf.charAt(i);
    char uc = Character.toLowerCase(lc);
    if (lc != uc) {
        buf.setCharAt(i, uc);
return buf;
voidtoLowerCase(StringBuffer buffer)
Puts all chars in the buffer in lower case. 
final int N = buffer.length();
for (int i = 0; i < N; i++) {
    char c = buffer.charAt(i);
    if (Character.isUpperCase(c)) {
        c = Character.toLowerCase(c);
        buffer.setCharAt(i, c);
StringtoLowerCase0(String string)
to Lower Case 
return Character.toLowerCase(string.charAt(0)) + string.substring(1);
StringtoLowerCaseAscii(String s)
Returns a string with all ASCII upper-case letters converted to lower-case. 
if (s == null)
    return null;
int len = s.length();
char c = 0;
boolean hasUpperCase = false;
for (int i = 0; i < len; i++) {
    c = s.charAt(i);
    if (c >= 'A' && c <= 'Z') {
...
StringtoLowerCaseFirst(String str)
to Lower Case First 
if (str == null)
    return null;
if ("".equals(str))
    return str;
String first = String.valueOf(str.charAt(0));
str.replaceFirst(first, first.toLowerCase());
return str;