how can I pass a class to the mvc model

I have this class but I can not find the way to pass it to the mvc model, to work with the Setter and Getter and finally send the data to another class where a jLabel will receive it.

public class Clientes {
  Connection conectando = null;
  PreparedStatement preparando;
  ResultSet resultado;


  public void idclientes(){
    Connection conectando=null;
    PreparedStatement preparando;
    ResultSet resultado;
    conectando = Conectar.getConnection();
    int j;
    int cont=1;
    String num="";
    String c="";
    String SQL="select max(idCliente) from clientesAlmacen";
    try {

        Statement st = conectando.prepareStatement(SQL);
        ResultSet rs=st.executeQuery(SQL);
        if(rs.next())
        {              
          c=rs.getString(1);
        }       
        if(c==null){
          jLabel1.setText("CC0001");
        }
        else{
          char r1=c.charAt(2);
          char r2=c.charAt(3);
          char r3=c.charAt(4);
          char r4=c.charAt(5);
          String r="";
          r=""+r1+r2+r3+r4;

          j=Integer.parseInt(r);
          GenerarCodigos gen= new GenerarCodigos();
          gen.generar(j);
          jLabel1.setText("CC"+gen.serie());    
        }         

    } catch (SQLException ex) {

      Logger.getLogger(NuevoCliente.class.getName()).log(Level.SEVERE, null, ex);
    }
  }
}