Java Utililty Methods String Escape

String addEscape(String a_unescaped)
Add escape characters (\) before each of the characters to escape and each of the escape characters themselves.

String escaped = null;
if (null != a_unescaped) {
 StringBuffer text = new StringBuffer();
 char charToEscape = ',';
 char character;
 int length = a_unescaped.length();
 for (int index = 0; index < length; index++) {
 character = a_unescaped.charAt(index);
...

String addEscapeCapacityToRegex(String inputRegex)
This will encode the given Regex string the capacity to ignore the escaped word, i.e.

return String.format("(?<!%1$s)%2$s", ESCAPE_CHARACTER, inputRegex);

String addEscapeChar(String str)

Description:Convert string which contains '%','_' to '\%' and '\_'

String output = str.replaceAll("%", "\\\\" + "%");
output = output.replaceAll("_", "\\\\" + "_");
return output;

String addEscapeCharactersForSpaces(String s)
add Escape Characters For Spaces

String outputString = "";
for (int i = 0; i < s.length(); ++i) {
 if (s.charAt(i) == ' ')
 outputString = outputString.concat("\\");
 outputString = outputString.concat(s.substring(i, i + 1));
return outputString;

String addEscapeCharsToBackSlash(String code)
Adds escape characters to all occurences of \.

if (code == null) {
 code = "";
return code.replace("\\", "\\\\");

String addEscapes(String s)
add Escapes

s = s.replace("\r", "\\r");
s = s.replace("\n", "\\n");
return s = s.replace("\"", "\\\"");

String addEscapes(String str)
Replaces unprintable characters by their espaced (or unicode escaped) equivalents in the given string.

StringBuilder sb = new StringBuilder();
char ch;
for (int i = 0; i < str.length(); i++) {
 switch (str.charAt(i)) {
 case 0:
 continue;
 case '\b':
 sb.append("\\b");
...

String addEscapeSequence(String inputStr)
add Escape Sequence

if (inputStr.contains("\\")) {
 inputStr = inputStr.replace("\\", "\\\\");
if (inputStr.contains("\'")) {
 inputStr = inputStr.replace("\'", "\\\'");
if (inputStr.contains("\"")) {
 inputStr = inputStr.replace("\"", "\\\"");
...

String addEscapesToCode(String code)
Adds escape characters to all occurences of ", \ and \n.

code = addEscapeCharsToBackSlash(code);
code = addEscapeNewLinesToCode(code);
return addEscapeCharsToCode(code);

String addEscChar(String str)
add Esc Char

return str.replace("'", "\'");