Java Utililty Methods String Quote

StringBuilder buf = new StringBuilder();
quoteTo(cs, buf);
return buf.toString();

if (str == null)
    return "null";
int len = str.length();
StringBuilder buf = new StringBuilder(len + 10);
buf.append("\"");
for (int i = 0; i < len; i++) {
    char c = str.charAt(i);
    switch (c) {
...

StringBuilder builder = new StringBuilder(value.length() + 2);
builder.append('"');
for (int i = 0; i < value.length(); i++) {
    char c = value.charAt(i);
    switch (c) {
    case '"':
        builder.append("\\\"");
        break;
...

final StringBuilder buff = builder().append('"');
final int len = original.length();
for (int i = 0; i < len; i++) {
    final char c = original.charAt(i);
    if (c == '"' || c == '#') {
        buff.append('#');
    buff.append(c);
...

int length = phrase.length();
final StringBuilder builder = new StringBuilder();
builder.append('"');
char ch = '\0';
for (int index = 0; index < length; index++) {
    ch = phrase.charAt(index);
    if (ch == '\\') {
        builder.append("\\\\").append('\\').append(phrase.charAt(++index));
...

if (s.startsWith("'")) {
    return s;
return "'" + s + "'";

return (str == null || str.length() == 0 || (str.charAt(0) == '`' && str.charAt(str.length() - 1) == '`'))
        ? str
        : new StringBuilder(str.length() + 2).append('`').append(str).append('`').toString();

return QUOTE + str + QUOTE;

return "\"" + str + "\"";

if (sValue == null)
    return sValue;
else
    return "'" + sValue + "'";