[FIXED] Error Exception java.util.NoSuchElementException

Issue

I am trying to remove items from my list while iterate, that is why he used Iterator, to later insert emails into a queue. But I get the following error when inserting more elements:

Iterator<String> listCorreos = request.getCorreos().iterator();

            while (listCorreos.hasNext()) {
                for (Cola cola : colas) {
                    String correo = listCorreos.next();
                    cola.insertar(correo);
                    System.err.println("Se agrego " + correo + " a la cola: " + cola.obtenerNombre());
                        listCorreos.remove();
                }
            }

I get the following error

java.util.NoSuchElementException
        at java.base/java.util.ArrayList$Itr.next(Unknown Source)

Thank you in advance for any kind of help.

Solution

Your problem is that you have two loops and in the second loop you are getting the next element from the object controlling loop 1

See line String correo = listCorreos.next();

        while (listCorreos.hasNext()) { // loop 1
            for (Cola cola : colas) { // loop 2
                String correo = listCorreos.next(); // Here is your problem. the number of colas and the number of items in listCorreos are apparently matched up
                cola.insertar(correo);
                System.err.println("Se agrego " + correo + " a la cola: " + cola.obtenerNombre());
                    listCorreos.remove();
            }
        }

Answered By - ControlAltDel
Answer Checked By - Mildred Charles (JavaFixing Admin)