code: public static String handleControlCharacterBack(final String pvValue) {
  
  		if (pvValue == null) {
  			return null;
  		}
  		StringBuffer sb = new StringBuffer();
  		int l = pvValue.length();
  		char c;
  		for (int i=0; i<l; i++) {
  			c = pvValue.charAt(i);
              switch (c) {
  	            case 0:
  	            	break;
  	            case '\n':
  	            case '\r':
  	            case '\t':
  	            	sb.append(c);
  	            	break;
  	            case '\\':
  	                i++;
  					c = pvValue.charAt(i);
  	                switch (c) {
  		                case 'b':
  		                    sb.append('\b');
  		                    break;
  		                case 't':
  		                    sb.append('\t');
  		                    break;
  		                case 'n':
  		                    sb.append('\n');
  		                    break;
  		                case 'f':
  		                    sb.append('\f');
  		                    break;
  		                case 'r':
  		                    sb.append('\r');
  		                    break;
  //		                case 'u':
  //		                    sb.append((char)Integer.parseInt(next(4), 16));
  //		                    break;
  //		                case 'x' :
  //		                    sb.append((char) Integer.parseInt(next(2), 16));
  //		                    break;
  		                default:
  		                    sb.append(c);
  		                }
  	                break;
  	            default:
  	                sb.append(c);
  	            }
          }
  		return sb.toString();
  	}
docs: Convert escape (control) character from a JSON representation in a Java-String.
  This means: <code>\\b</code> to <code>\b</code>
  @param pvValue
  @return converted String