Consultar um Boolean no banco [RESOLVIDO]

public class JDBCConsultar {
     public Box consultar(Box box) {
        Connection consultar = PostgreSQL.getConnection();
           try{
            String sql = "Select * from box where id_box = ?";
            PreparedStatement stmt = consultar.prepareStatement(sql);
            stmt.setInt(1, box.getId());

            ResultSet rs =  stmt.executeQuery();

            if(!rs.next())
            return null;

            Box box1 = new Box();
            box1.setId(rs.getInt("id_box"));
            box1.setNumero(rs.getInt("numero"));
            box1.isVago(rs.getBoolean("vago"));// como faço a consulta de um tipo boolean.


                  
        }catch(Exception e){
           JOptionPane.showMessageDialog(null, "erro ao Consultar Box" + e.getMessage());
        }
    finally {
            try {
                consultar.close();
            } catch (SQLException ex) {
                Logger.getLogger(JDBCCriarTabela.class.getName()).log(Level.SEVERE, null, ex);
            }

        }

  
}
}