public TokenMgrError() 
{

}

No arg constructor.

 public TokenMgrError(String message,
    int reason) 
{
    super(message);
    errorCode = reason;
}

Constructor with message and reason.

 public TokenMgrError(boolean EOFSeen,
    int lexState,
    int errorLine,
    int errorColumn,
    String errorAfter,
    char curChar,
    int reason) 
{
    this(LexicalError(EOFSeen, lexState, errorLine, errorColumn, errorAfter, curChar), reason);
}

Full Constructor.

 protected static String LexicalError(boolean EOFSeen,
    int lexState,
    int errorLine,
    int errorColumn,
    String errorAfter,
    char curChar) 
{
    return("Lexical error at line " +
          errorLine + ", column " +
          errorColumn + ".  Encountered: " +
          (EOFSeen ? "< EOF > " : ("\"" + addEscapes(String.valueOf(curChar)) + "\"") + " (" + (int)curChar + "), ") +
          "after : \"" + addEscapes(errorAfter) + "\"");
}

Returns a detailed message for the Error when it is thrown by the token manager to indicate a lexical error. Parameters : EOFSeen : indicates if EOF caused the lexical error curLexState : lexical state in which this error occurred errorLine : line number when the error occurred errorColumn : column number when the error occurred errorAfter : prefix that was seen before this error occurred curchar : the offending character Note: You can customize the lexical error message by modifying this method.

 protected static final String addEscapes(String str) 
{
    StringBuffer retval = new StringBuffer();
    char ch;
    for (int i = 0; i <  str.length(); i++) {
      switch (str.charAt(i))
      {
        case 0 :
          continue;
        case '\b':
          retval.append("\\b");
          continue;
        case '\t':
          retval.append("\\t");
          continue;
        case '\n':
          retval.append("\\n");
          continue;
        case '\f':
          retval.append("\\f");
          continue;
        case '\r':
          retval.append("\\r");
          continue;
        case '\"':
          retval.append("\\\"");
          continue;
        case '\'':
          retval.append("\\\'");
          continue;
        case '\\':
          retval.append("\\\\");
          continue;
        default:
          if ((ch = str.charAt(i)) <  0x20 || ch  > 0x7e) {
            String s = "0000" + Integer.toString(ch, 16);
            retval.append("\\u" + s.substring(s.length() - 4, s.length()));
          } else {
            retval.append(ch);
          }
          continue;
      }
    }
    return retval.toString();
}

Replaces unprintable characters by their escaped (or unicode escaped) equivalents in the given string

 public String getMessage() 
{
    return super.getMessage();
}

You can also modify the body of this method to customize your error messages. For example, cases like LOOP_DETECTED and INVALID_LEXICAL_STATE are not of end-users concern, so you can return something like : "Internal Error : Please file a bug report .... " from this method for such cases in the release version of your parser.