关于JSP分页问题

     //根据页数+SQL条件查询留言信息
    public Collection Select(int page, String sql) {
        Collection coll = new ArrayList();
        Connection con = null;
        ResultSet rs = null;
        PreparedStatement ps = null;
        int tip = FinalConstants.STEP * (page - 1);
        try {
            con = Database.getConnection();
            ps = con.prepareStatement(FinalConstants.SELECT_GUESTBOARD + sql);
            rs = ps.executeQuery();
            if (tip <= 0) {
                rs.beforeFirst();
            } else {
                if (!rs.absolute(tip)) {
                    rs.beforeFirst();
                }
            }            for (int i = 1; rs.next() && i <= FinalConstants.STEP; i++) {
                Guestboard gb = new Guestboard();
                gb.setGid(rs.getInt("gid"));
                gb.setTitle(ParamUtils.getSqlString(rs.getString("title")));
                gb.setGuest(ParamUtils.getSqlString(rs.getString("guest")));
                gb.setGtime(ParamUtils.getSqlString(rs.getString("gtime")));
                gb.setContent(ParamUtils.getSqlString(rs.getString("content")));
                gb.setGflag(rs.getInt("gflag"));
                gb.setRtime(ParamUtils.getSqlString(rs.getString("rtime")));
                gb.setRecontent(ParamUtils.getSqlString(rs.getString("recontent")));
                coll.add(gb);
            }
        } catch (SQLException ex) {
            System.out.println(ex.getMessage());
        } finally {
            System.out.println(ps + " Dbguestboard.Select(int page,String sql) ");
            try {
                if (ps != null) {
                    ps.close();
                    ps = null;
                }
            } catch (SQLException e) {
                ps = null;
            }
            try {
                if (con != null) {
                    con.close();
                    con = null;
                }
            } catch (SQLException e) {
                con = null;
            }
        }
        return coll;
    }
请问执行完IF语句RS指针指在哪一行，
(!rs.absolute(tip)) 是个条件
它会将指针移动到TIP行吗？
谢谢高手指点，
我想不明白！