Java Utililty Methods String Unescape

final StringBuilder buff = builder();
final int len = target.length();
for (int i = 0; i < len; i++) {
    final char ch = target.charAt(i);
    if (ch == '#') {
        i++;
        buff.append(target.charAt(i));
    } else {
...

return aSpecification.replaceAll("%2F", "/");

if (input == null) {
    return input;
return input.replace("\\t", "\t").replace("\\n", "\n").replace("\\r", "\r");

if (name == null) {
    throw new IllegalArgumentException();
StringBuilder buffer = new StringBuilder(name.length());
String str = name;
int i = str.indexOf(escapeChar);
while (i > -1 && i + 2 < str.length()) {
    buffer.append(str.toCharArray(), 0, i);
...

char ch;
final StringBuilder sb = new StringBuilder();
final StringBuilder sb2 = new StringBuilder();
int ii;
int i;
for (i = 0; i < s.length(); i++) {
    ch = s.charAt(i);
    switch (ch) {
...

if (source == null) {
    return null;
String result = source;
result = result.replaceAll("&", "&");
result = result.replaceAll(""", "\"");
result = result.replaceAll("'", "\'");
result = result.replaceAll("&lt;", "<");
...

final StringBuilder builder = new StringBuilder(str.length());
unescape(str, escapeChar, builder);
return builder.toString();

final StringBuilder sbString = new StringBuilder(string.length());
boolean escaped = false;
for (int i = 0; i < string.length(); i++) {
    final char chr = string.charAt(i);
    if (chr == '\\') {
        if (i + 1 < string.length() && string.charAt(i + 1) == quoteChar) {
            i++;
            sbString.append(quoteChar);
...

StringBuilder result = new StringBuilder(text.length());
int i = 0;
int n = text.length();
while (i < n) {
    char charAt = text.charAt(i);
    if (charAt != '&') {
        result.append(charAt);
        i++;
...

if (inval != null && escapeChar != null && inval.length != 0) {
    for (int i = 0; i < inval.length; i++) {
        inval[i] = unescape(inval[i], escapeChar);
return inval;