Java Utililty Methods String Decamel Case

List of utility methods to do String Decamel Case

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String Decamel Case

Description

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

Method

if (name == null)
 return null;
return name.replaceAll(String.format("%s|%s|%s", "(?<=[A-Z])(?=[A-Z][a-z])", "(?<=[^A-Z])(?=[A-Z])",
 "(?<=[A-Za-z])(?=[^A-Za-z])"), " ");

String deCamelCap(String s)
de Camel Cap

if (s.length() == 0)
 return s;
return Character.toUpperCase(s.charAt(0)) + deCamel(s.substring(1));

String deCamelCase(final String original)
Converts a camel cased string into an underscored one, e.g.

if (original == null)
 return null;
if (original.isEmpty())
 return original;
return original.replaceAll("(.)(\\p{Upper})", "1ドル_2ドル").toLowerCase();

String deCamelCase(String camelCased, String delim)
de Camel Case

final StringBuilder path = new StringBuilder();
boolean lastUpper = true;
for (char c : camelCased.toCharArray()) {
 if (Character.isUpperCase(c)) {
 c = Character.toLowerCase(c);
 if (!lastUpper) {
 lastUpper = true;
 path.append(delim);
...

String deCamelCase(String identifier)
de Camel Case

if (identifier == null || identifier.isEmpty()) {
 return null;
StringBuilder nameBuilder = new StringBuilder();
for (int i = 0; i < identifier.length(); i++) {
 char c = identifier.charAt(i);
 if (i == 0) {
 nameBuilder.append(Character.toUpperCase(c));
...

String deCamelCaseStyle(String style)
convert for example backgrounColor to background-color

String property = "";
for (int j = 0; j < style.length(); j++) {
 char character = style.charAt(j);
 if (Character.isUpperCase(character)) {
 property += "-" + Character.toLowerCase(character);
 } else {
 property += character;
return property;

String decamelise(String testName)
decamelise

String nocamel = charAtToUpper(0, testName);
for (int i = 1; i < testName.length(); i++) {
 char nextChar = testName.charAt(i);
 if (isUpper(nextChar)) {
 nocamel += spaceAndToLower(nextChar);
 } else {
 nocamel += nextChar;
return nocamel;

String decamelize(final String s)
decamelize

if (s == null) {
 return null;
if (s.length() == 1) {
 return s.toUpperCase();
StringBuilder buf = new StringBuilder(40);
int pos = 0;
...

String decamelize(String s)
decamelize

if (s == null || s.equals("")) {
 return s;
StringBuffer buf = new StringBuffer();
buf.append(Character.toLowerCase(s.charAt(0)));
for (int i = 1; i < s.length(); i++) {
 if (Character.isUpperCase(s.charAt(i))) {
 if (s.length() > i + 1 && Character.isLowerCase(s.charAt(i + 1))) {
...

String deCamelize(String value)
de Camelize

if (value == null) {
 return null;
StringBuilder deCamelized = new StringBuilder(value.length() + 10);
for (int i = 0; i < value.length(); i++) {
 if (Character.isUpperCase(value.charAt(i)) && deCamelized.length() > 0) {
 deCamelized.append('_');
 deCamelized.append(Character.toUpperCase(value.charAt(i)));
return deCamelized.toString();