Help with statement

[Sabio - PSQL <slopez_pg@xxxxxxxxxxxxxxxx>]

   public int cedula_actualizar(String strcedula, String strids) {
       PreparedStatement ST = null;
       int retVal = 0;
       try {
           ST = conexion.prepareStatement("UPDATE maestro_partes SET 
cedula='"+strcedula+"' WHERE consecutivo_identificacion IN ("+strids+")");
           retVal = ST.executeUpdate();
           ST.close();
       } catch (Exception e) {
           System.out.println(e.getMessage());
       }
       return retVal;
   }


When execute this function with single data like this 3434 in strids, it 
works, but when is pass somethine like this: 12232,3434,3,4545,34,3 
don't work, Why?
In database cedula is varchar and consecutivo_identificacion is int