Java Utililty Methods String Camel Case to Upper Case

List of utility methods to do String Camel Case to Upper Case

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Description

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

Method

StringcamelCaseToUpperCase(final String camelCase)
camel Case To Upper Case 
StringBuffer result = new StringBuffer();
boolean lastWasNotUpperCase = false;
for (int chI = 0; chI < camelCase.length(); chI++) {
    char ch = camelCase.charAt(chI);
    if (Character.isUpperCase(ch)) {
        if (lastWasNotUpperCase) {
            result.append("_");
        lastWasNotUpperCase = false;
    } else {
        lastWasNotUpperCase = true;
    result.append(Character.toUpperCase(ch));
return result.toString();
StringcamelCaseToUpperCase(String camelCaseName)
camel Case To Upper Case 
StringBuilder upperCaseName = new StringBuilder();
boolean prevCharIsNumber = false;
for (int i = 0; i < camelCaseName.length(); i++) {
    char c = camelCaseName.charAt(i);
    if (i > 0 && c >= 'A' && c <= 'Z') {
        upperCaseName.append("_").append(c);
        prevCharIsNumber = false;
    } else if (c >= '0' && c <= '9') {
...
StringcamelCaseToUpperCase(String in)
camel Case To Upper Case 
String regex = "([a-z])([A-Z])";
String replacement = "$1_$2";
String out = in.replaceAll(regex, replacement).toUpperCase();
return out;
StringcamelToUpper(String camel)
Convert CamelCase strings to ALL_UPPERCASE_WITH_UNDERSCORES. 
return camel.replaceAll("([A-Z][a-z0-9])", "_$1").substring(1).toUpperCase();
StringcamelToUpper(String name)
Converts a camelCase name into an upper-case underscore-separated name. 
StringBuilder buf = new StringBuilder();
for (int i = 0; i < name.length(); i++) {
    char c = name.charAt(i);
    if (Character.isUpperCase(c)) {
        buf.append('_');
    } else {
        c = Character.toUpperCase(c);
    buf.append(c);
return buf.toString();
StringcamelToUpper(String s)
Converts a camel-case name to an upper-case name with underscores. 
StringBuilder buf = new StringBuilder(s.length() + 10);
int prevUpper = -1;
for (int i = 0; i < s.length(); ++i) {
    char c = s.charAt(i);
    if (Character.isUpperCase(c)) {
        if (i > prevUpper + 1) {
            buf.append('_');
        prevUpper = i;
    } else {
        c = Character.toUpperCase(c);
    buf.append(c);
return buf.toString();