HashSet<Operacao> operacoes = new HashSet<Operacao>();
while (op.next()) {
operacoes.add(new Operacao(op.getInt(1), op.getString(2),r.getString(3)));
}
l.add(new Usuario(r.getString(2), r.getString(3), r.getString(4),
new TipoUsuario(r.getInt(5), r.getString(6), operacoes)));
}
st = conn
.prepareStatement("select ((count(*) - 1) / ? ) + 1 from usuario");
st.setInt(1, rowsPerPage);
ResultSet t = st.executeQuery();