private static void ClassDecl() {
    check(ident);
    Block();
    }

    private static void ConstDecl() {
    check(final_);

    if (sym == ident)
        Type();

    check(ident);
    check(assign);

    if (sym == number || sym == charCon)
        check(semicolon);
    }

    private static void VarDecl() {
    if (sym == ident)
        Type();
    check(ident);
    while (sym == comma)
        check(ident);
    check(semicolon);
    }

    private static void MethodDecl() {
    if (sym == ident)
        Type();
    else
        check(void_);
    check(ident);
    check(lpar);
    if (sym == ident)
        FormPars();
    check(rpar);
    while (sym == ident)
        VarDecl();
    Block();
    }

    private static void FormPars() {
    Type();
    check(ident);
    while (sym == comma) {
        scan();
        if (sym == ident) {
        Type();
        check(ident);
        }
    }

    }

    private static void Block() {
    check(lbrace);
    while (sym == ident)
        StatementDecl();
    check(rbrace);
    }