class Customer {

String name;
int ticket;

Customer(String name, int ticket) {
    this.name = name;
    this.ticket = ticket;

}

String getName() {
    return name;

}

int getTicket() {
    return ticket;
}
}

public class Main {

public static void main(String[] args) {
    Queue<Customer> queue = new LinkedList<>();
    queue.add(new Customer("a1", 1));
    queue.add(new Customer("a2", 2));
    queue.add(new Customer("a3", -1));
    queue.add(new Customer("a4", -1));

    queueAnalysis(queue);
}

public static void queueAnalysis(Queue<Customer> queue) {

    System.out.println("Original: " + queue + "n");
    String names[] = null;
    int cant = 0;
    int tam = queue.size();

    for (int i = 0; i < tam; i++) {
        if (queue.peek().getTicket() == -1) {
            names[i] = queue.peek().getName();
            cant++;
            queue.poll();


        }

    }
    System.out.println("colados: " + names + "n");
    System.out.println("Cola final: " +queue);

    //Customer c;
    for (Iterator it = queue.iterator(); it.hasNext();) {
        System.out.println((Customer) it.next());
    }

}

}