Java Utililty Methods String Unescape

List of utility methods to do String Unescape

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Description

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

Method

Stringunescape(String input)
unescape 
StringBuilder builder = new StringBuilder();
int i = 0;
while (i < input.length()) {
    char delimiter = input.charAt(i);
    i++; 
    if (delimiter == '\\' && i < input.length()) {
        char ch = input.charAt(i);
        i++;
...
Stringunescape(String input, char escapeChar)
unescape 
final StringBuilder out = new StringBuilder();
boolean escapeNext = false;
for (char c : input.toCharArray()) {
    if (c == escapeChar && !escapeNext) {
        escapeNext = true;
    } else {
        out.append(c);
        escapeNext = false;
...
Stringunescape(String line)
unescape 
if (line == null) {
    return null;
StringBuffer sb = new StringBuffer();
for (int i = 0, n = line.length(); i < n; i++) {
    char c = line.charAt(i);
    if (c == '\\') {
        if (i == n - 1) {
...
Stringunescape(String line)
Parse html/xml escape sequences 
line = line.replace("&amp;", "&");
line = line.replace("&quot;", "\"");
line = line.replace("&gt;", ">");
line = line.replace("&lt;", "<");
return line;
Stringunescape(String line, int start, int end)
unescape 
StringBuffer sb = new StringBuffer();
boolean escape = false;
StringBuffer escBuf = new StringBuffer();
for (int i = start; i < end; i++) {
    char c = line.charAt(i);
    switch (c) {
    case '&':
        escape = true;
...
Stringunescape(String literal, String escapedChars)
Removes all escape sequences in a string and return unescaped string escape character is backslash \, so \\ --> \, \' --> ' additional escaped characters can be allowed in escapedChars. 
char c = '?';
int i = 0;
if (null == escapedChars) {
    escapedChars = "\\'";
if (null == literal) {
    return null;
int len = literal.length();
if (len == 1 && literal.charAt(0) == '\\') {
    return null;
if (len > 1 && literal.charAt(len - 2) != '\\' && literal.charAt(len - 1) == '\\') {
    return null;
StringBuilder sb = new StringBuilder(len + 16);
for (i = 0; i < len; i++) {
    c = literal.charAt(i);
    if (c == '\\') {
        char escChar = literal.charAt(i + 1);
        boolean matched = false;
        for (int j = 0; j < escapedChars.length(); j++) {
            if (escChar == escapedChars.charAt(j)) {
                sb.append(escChar);
                ++i;
                matched = true;
                break;
        if (!matched) {
            return null;
    } else {
        sb.append(literal.charAt(i));
return sb.toString();
Stringunescape(String name)
unescape 
name = name.replaceAll("'\\['", "[");
name = name.replaceAll("'\\]'", "]");
name = name.replaceAll("\\'\\?\\'", "?");
name = name.replaceAll("\\'\\'", "'");
return name;
Stringunescape(String oldStr)
unescape 
StringBuilder newStr = new StringBuilder(oldStr.length());
boolean backSlashPresent = false;
for (int i = 0; i < oldStr.length(); i++) {
    int cp = oldStr.codePointAt(i);
    if (oldStr.codePointAt(i) > Character.MAX_VALUE) {
        i++;
    if (!backSlashPresent) {
...
Stringunescape(String original, char[] spec)
unescape 
String n = original;
for (char c : spec) {
    n = n.replace("\\" + c, "" + c);
n = original.replace("\\\\", "\\");
return n;
Stringunescape(String property)
Unescapes the property name 
return property.replace('$', '.');