Java Utililty Methods String Underscore

List of utility methods to do String Underscore

  1. HOME
  2. Java
  3. S
  4. String Underscore

Description

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

Method

StringunderscoreAllWhitespace(String str)
Change to underscore all whitespace from the given String: leading, trailing, and inbetween characters. 
if (str == null || str.length() == 0) {
    return str;
StringBuilder sb = new StringBuilder(str);
int index = 0;
while (sb.length() > index) {
    if (Character.isWhitespace(sb.charAt(index))) {
        sb.replace(index, index + 1, "_");
...
StringunderscoreAndLowercase(String s)
underscore And Lowercase 
return s.replaceAll(String.format("%s|%s", "(?<=[A-Z])(?=[A-Z][a-z])", "(?<=[^A-Z])(?=[A-Z])"), "_")
        .toLowerCase();
StringunderScoreBreakToCaseBreak(final String s)
under Score Break To Case Break 
final StringBuilder sb = new StringBuilder();
final char[] chars = s.toCharArray();
boolean nextShouldBeUpperCase = true;
for (final char c : chars) {
    if (c == '_') {
        nextShouldBeUpperCase = true;
    } else if (c == '$' || !Character.isJavaIdentifierPart(c)) {
        sb.append('_');
...
StringunderscoreCase(String s)
underscore Case 
if (s.isEmpty()) {
    return s;
StringBuilder sb = new StringBuilder();
char[] chars = s.toCharArray();
sb.append(chars[0]);
for (int i = 1; i < chars.length; i++) {
    char ch = chars[i];
...
StringunderScoreCase2CamelCase(String str)
under Score Case Camel Case 
if (!str.contains("_"))
    return str;
StringBuilder sb = new StringBuilder();
char[] chars = str.toCharArray();
boolean hitUnderScore = false;
sb.append(chars[0]);
for (int i = 1; i < chars.length; i++) {
    char c = chars[i];
...
Stringunderscored(String string)
Convert from CamelCase to underscored: MyModel -> my_model. 
return separated(string, '_');
StringunderscoredToCamel(String string)
underscored To Camel 
String[] a = string.split("_");
for (int i = 0, n = a.length; i < n; i++) {
    String s = a[i].trim();
    a[i] = capitalize(a[i]);
return implode(a, "");
StringunderscoreName(String camelCaseName)
underscore Name 
StringBuilder result = new StringBuilder();
if (camelCaseName != null && camelCaseName.length() > 0) {
    result.append(camelCaseName.substring(0, 1).toLowerCase());
    for (int i = 1; i < camelCaseName.length(); i++) {
        char ch = camelCaseName.charAt(i);
        if (Character.isUpperCase(ch)) {
            result.append("_");
            result.append(Character.toLowerCase(ch));
...
StringunderscoreName(String name)
underscore Name 
return name.substring(0, 1).toLowerCase() + name.substring(1).replaceAll("([A-Z])", "_$1").toLowerCase();
StringunderscoreSpaces(String input)
underscore Spaces 
if (input == null)
    return null;
String tmp = input.trim().replaceAll("\\s+", "_");
tmp = tmp.replaceAll("_+", "_");
return tmp;