[antlr-interest] Cannot find symbol stuff

[Herumor]

Hello, since my professor wants the lexer into a file and the parser
into another one I did so.
I added importVocab = "EasyJava" in the parser and exportVocab =
"EasyJava" in the lexer.
I read at some tutorials to learn how changing the type of a token or an
expression just for that rule, but when I do so I get this error.

/
C:\Documents and
Settings\spotted\Documenti\grammatica\codice_generato>javac *.j
ava
EasyJavaLexer.java:485: cannot find symbol
symbol  : variable DOT
location: class EasyJavaLexer
                        _ttype = DOT;
                                 ^
EasyJavaLexer.java:500: cannot find symbol
symbol  : variable DEC_NUMBERS
location: class EasyJavaLexer
                        _ttype = DEC_NUMBERS;
                                 ^
2 errors

C:\Documents and Settings\spotted\Documenti\grammatica\codice_generato>

/The following is the lexer:

/*************************************************                                              

 *                                                                      
                       *
 *                    EASY JAVA
LEXER                                        *
 *                                               
                                              *
 *************************************************/               

class EasyJavaLexer extends Lexer;

options {
  charVocabulary='\3'..'\377';
  exportVocab=EasyJava;      // call the vocabulary "EasyJava"
  testLiterals=false;    // don't automatically test for literals
  k=5;                   // lookahead
}


IDENTIFIER
    options {testLiterals=true; generateAmbigWarnings=false;}
    :    ('a'..'z'|'A'..'Z'|'_'|'$') ('a'..'z'|'A'..'Z'|'_'|'0'..'9'|'$')*
    ;


NUMBERS : ('0' | '1'..'9' ('0'..'9')*) ('.' {_ttype = DOT;} ('0'..'9')+
{$setType(DEC_NUMBERS);})? ;                                           
                                                                       
                                                                       
                                                                       
                                                                       
                                                                       
                                               
 
// OPERATORS
QUESTION    options { paraphrase="?"; }    :    '?'        ;
LRBRACK        options { paraphrase="("; }        :    '('        ;
RRBRACK        options { paraphrase=")"; }        :    ')'        ;
LSBRACK        options { paraphrase="["; }        :    '['        ;
RSBRACK        options { paraphrase="]"; }        :    ']'        ;
LCBRACK        options { paraphrase="{"; }        :    '{'        ;
RCBRACK        options { paraphrase="}"; }        :    '}'        ;
COLON        options { paraphrase=":"; }        :    ':'        ;
COMMA        options { paraphrase=","; }        :    ','        ;
LNOT        options { paraphrase="!"; }        :    '!'        ;
INC            options { paraphrase="++"; }    :    "++"    ;
DEC            options { paraphrase="--"; }    :    "--"    ;
MOD            options { paraphrase="%"; }         :    '%'        ;
SEMI         options { paraphrase=";"; }        :    ';'        ;

//  ARITHMETIC OPERATORS

DIV                :    '/'        ;
PLUS            :    '+'        ;
MINUS            :    '-'        ;
MUL             :    '*'        ;


// LOGICAL OPERATORS

LAND options { paraphrase="&&"; }        :    "&&"    ;
LOR     options { paraphrase="||"; }        :    "||"    ;



// RELATIONAL OPERATORS

LTE    options { paraphrase="<="; }                        :    "<="    ;
LT    options { paraphrase="<;"; }                            :   
'<'        ;
GTE    options { paraphrase=">="; }                        :    ">="    ;
GT    options { paraphrase=">"; }                            :    '>'   
    ;


// ASSIGN OPERATORS
ASSIGN    options { paraphrase="="; }        :    '='        ;

BAND_ASSIGN     options { paraphrase="&="; }        :    "&="    ;
BOR_ASSIGN     options { paraphrase="|="; }        :    "|="    ;
BXOR_ASSIGN     options { paraphrase="^="; }        :    "^="    ;
SL_ASSIGN     options { paraphrase="<<="; }        :    "<<="    ;
BSR_ASSIGN     options { paraphrase=">>>="; }        :    ">>>="    ;
SR_ASSIGN     options { paraphrase=">>="; }        :    ">>="    ;
MOD_ASSIGN     options { paraphrase="%="; }        :    "%="    ;
MUL_ASSIGN     options { paraphrase="*="; }        :    "*="    ;
DIV_ASSIGN     options { paraphrase="/="; }        :    "/="    ;
MINUS_ASSIGN options { paraphrase="-="; }        :    "-="    ;
PLUS_ASSIGN     options { paraphrase="+="; }        :    "+="    ;

// BITWISE OPERATORS

BXOR options { paraphrase="^"; }            :    '^'        ;
BOR     options { paraphrase="|"; }            :    '|'        ;
BAND options { paraphrase="&"; }            :    '&'        ;
BNOT options { paraphrase="~"; }            :    '~'        ;


// EQUALITY OPERATORS

EQUAL        options { paraphrase="=="; }        :    "=="    ;
NOT_EQUAL    options { paraphrase="!="; }        :    "!="    ;



// SHIFT
SR    options { paraphrase=">>"; }            :    ">>"    ;
BSR    options { paraphrase=">>>"; }            :    ">>>"    ;
SL    options { paraphrase="<<"; }            :    "<<"    ;


// Whitespace -- ignored

WS    :    (    ' '
        |    '\t'
        |    '\f'
            // handle newlines
        |    (    options {generateAmbigWarnings=false;}
            :    "\r\n"  // Evil DOS
            |    '\r'    // Macintosh
            |    '\n'    // Unix (the right way)
            )
            { newline(); }
        )+
        { _ttype = Token.SKIP; }
    ;

// Single-line comments

SL_COMMENT
    :    "//"
        (~('\n'|'\r'))* ('\n'|'\r'('\n')?)
        {$setType(Token.SKIP); newline();}
    ;

// multiple-line comments

ML_COMMENT
    :    "/*"
        (
            options {
                generateAmbigWarnings=false;
            }
        :
            { LA(2)!='/' }? '*'
        |    '\r' '\n'        {newline();}
        |    '\r'            {newline();}
        |    '\n'            {newline();}
        |    ~('*'|'\n'|'\r')
        )*
        "*/"
        {$setType(Token.SKIP);}
    ;

    // character literals
CHAR_LITERAL
    :    '\'' ( ESC | ~('\''|'\n'|'\r'|'\\') ) '\''
    ;

// string literals
STRING_LITERAL
    :    '"' (ESC|~('"'|'\\'|'\n'|'\r'))* '"'
    ;
   
    // Sequenza di escape -- viene utilizzato il flag protected in modo
che questa regola sia visibile solo all'interno del lexer

protected
ESC
    :    '\\'
        (    'n'
        |    'r'
        |    't'
        |    'b'
        |    'f'
        |    '"'
        |    '\''
        |    '\\'
        |    '0'..'3'
            (
                options {
                    warnWhenFollowAmbig = false;
                }
            :    '0'..'7'
                (
                    options {
                        warnWhenFollowAmbig = false;
                    }
                :    '0'..'7'
                )?
            )?
        |    '4'..'7'
            (
                options {
                    warnWhenFollowAmbig = false;
                }
            :    '0'..'7'
            )?
        )
    ;
----------------------------------------------------------------

I get the problem either using $settype or _ttype.
Thanks forward for help.