Java Utililty Methods String Quote

List of utility methods to do String Quote

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Description

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

Method

StringquoteIdentifier(String identifier, boolean isPedantic)
Surrounds identifier with "`" and duplicates these symbols inside the identifier. 
return quoteIdentifier(identifier, "`", isPedantic);
StringquoteIdentifier(String identifier, String quoteChar)
Quotes an identifier, escaping any dangling quotes within 
if (identifier == null) {
    return null;
identifier = identifier.trim();
int quoteCharLength = quoteChar.length();
if (quoteCharLength == 0 || " ".equals(quoteChar)) {
    return identifier;
if (identifier.startsWith(quoteChar) && identifier.endsWith(quoteChar)) {
    String identifierQuoteTrimmed = identifier.substring(quoteCharLength,
            identifier.length() - quoteCharLength);
    int quoteCharPos = identifierQuoteTrimmed.indexOf(quoteChar);
    while (quoteCharPos >= 0) {
        int quoteCharNextExpectedPos = quoteCharPos + quoteCharLength;
        int quoteCharNextPosition = identifierQuoteTrimmed.indexOf(quoteChar, quoteCharNextExpectedPos);
        if (quoteCharNextPosition == quoteCharNextExpectedPos) {
            quoteCharPos = identifierQuoteTrimmed.indexOf(quoteChar,
                    quoteCharNextPosition + quoteCharLength);
        } else {
            break;
    if (quoteCharPos < 0) {
        return identifier;
return quoteChar + identifier.replaceAll(quoteChar, quoteChar + quoteChar) + quoteChar;
StringquoteIdentifier(String s)
Enclose a string with double quotes. 
int length = s.length();
StringBuilder buff = new StringBuilder(length + 2);
buff.append('\"');
for (int i = 0; i < length; i++) {
    char c = s.charAt(i);
    if (c == '"') {
        buff.append(c);
    buff.append(c);
return buff.append('\"').toString();
StringquoteIdentifier(String s)
Contributed by Thomas Mueller to handle doubling quote characters found in an identifier. 
if (s == null) {
    return null;
StringBuilder buff = null;
buff = new StringBuilder();
for (int i = 0; i < s.length(); i++) {
    char c = s.charAt(i);
    if (c == '"' && i != 0 && i != s.length() - 1) {
...
StringquoteIfCeylonKeyword(String name)
Prefixes the given name with a "\i" if it is a Ceylon keyword 
if (isCeylonKeyword(name))
    return "\\i" + name;
return name;
StringquoteIfNeeded(String id)
quote If Needed 
if (id == null) {
    return null;
} else if (quoteNeeded(id)) {
    return SINGLE_QUOTE_STRING + id + SINGLE_QUOTE_STRING;
return id;
StringquoteIfNeeded(String input)
quote If Needed 
if (isBlank(input))
    return input;
String quote = "\'";
boolean needQuote = false;
if (input.indexOf('\'') > -1) {
    quote = "\"";
    needQuote = true;
if (input.indexOf(' ') > -1) {
    needQuote = true;
if (needQuote) {
    return quote + input + quote;
return input;
StringquoteIfNeeded(String source)
Add quotes around the object iff it's not a JSON object. 
String trimmed = source.trim();
if (isObject(trimmed) || isArray(trimmed) || isString(trimmed) || isBoolean(trimmed) || isNull(trimmed)
        || isNumber(trimmed)) {
    return source;
} else {
    return "\"" + source + "\"";
StringquoteIfNeeded(String value)
quote If Needed 
if (value == null) {
    return null;
return value.contains(SPACE) ? String.format("'%s'", value) : value;
voidquoteIfNeeded(StringBuilder buf, String str, String delim)
Append into buf the provided string, adding quotes if needed. 
if (str == null) {
    return;
int len = str.length();
if (len == 0) {
    return;
int ch;
...