Android Utililty Methods String Case Convert

List of utility methods to do String Case Convert

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Description

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

Method

StringtoLowerCase(String src)
Safely convert the string to lowercase. 
if (src == null) {
    return null;
} else {
    return src.toLowerCase();
StringtoUpperCase(String src)
Safely convert the string to uppercase. 
if (src == null) {
    return null;
} else {
    return src.toUpperCase();
StringflipCase(final String s)
flip Case 
final StringBuilder builder = new StringBuilder(s);
for (int i = 0; i < s.length(); ++i) {
    char c = builder.charAt(i);
    if (Character.isUpperCase(c)) {
        c = Character.toLowerCase(c);
    } else if (Character.isLowerCase(c)) {
        c = Character.toUpperCase(c);
    builder.setCharAt(i, c);
return builder.toString();
booleanmatchesIgnoreCase(String str, String query, int startingAt)
matches Ignore Case 
int len = query.length();
for (int i = 0; i < len; i++) {
    if (Character.toUpperCase(query.charAt(i)) != Character
            .toUpperCase(str.charAt(startingAt + i))) {
        return false;
return true;
...
StringlowerCase(String str)
lower Case 
if (str == null) {
    return null;
return str.toLowerCase();
StringupperCase(String str)
upper Case 
if (str == null) {
    return null;
return str.toUpperCase();
booleanendsWithIgnoreCase(String source, String suffix)
Whether the given source string ends with the given suffix, ignoring case. 
if (isEmpty(suffix))
    return true;
if (isEmpty(source))
    return false;
if (suffix.length() > source.length())
    return false;
return source.substring(source.length() - suffix.length())
        .toLowerCase().endsWith(suffix.toLowerCase());
...
booleanendsWithIgnoreCase(final String target1, final String target2)
ends With Ignore Case 
if (target1 == null || target2 == null) {
    return false;
int length1 = target1.length();
int length2 = target2.length();
if (length1 < length2) {
    return false;
String s1 = target1.substring(length1 - length2);
return s1.equalsIgnoreCase(target2);
booleanstartsWithIgnoreCase(final String target1, final String target2)
starts With Ignore Case 
if (target1 == null || target2 == null) {
    return false;
int length1 = target1.length();
int length2 = target2.length();
if (length1 < length2) {
    return false;
String s1 = target1.substring(0, target2.length());
return s1.equalsIgnoreCase(target2);
StringtoTitleCase(String s)
Converts a string into title case. 
StringBuilder titleCase = new StringBuilder();
boolean nextTitleCase = true;
for (char c : s.toCharArray()) {
    if (Character.isSpaceChar(c)) {
        nextTitleCase = true;
    } else if (nextTitleCase) {
        c = Character.toTitleCase(c);
        nextTitleCase = false;
...