OnJava8-Examples/collections/CollectionSequence.java at master · CSapprenticeWT/OnJava8-Examples · GitHub

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// collections/CollectionSequence.java

// We make no guarantees that this code is fit for any purpose.

// Visit http://OnJava8.com for more book information.

import reflection.pets.*;

import java.util.*;

public class CollectionSequence

extends AbstractCollection<Pet> {

private Pet[] pets = new PetCreator().array(8);

@Override

public int size() { return pets.length; }

@Override public Iterator<Pet> iterator() {

return new Iterator<Pet>() { // [1]

private int index = 0;

@Override public boolean hasNext() {

return index < pets.length;

}

@Override

public Pet next() { return pets[index++]; }

@Override

public void remove() { // Not implemented

throw new UnsupportedOperationException();

}

};

}

public static void main(String[] args) {

CollectionSequence c = new CollectionSequence();

InterfaceVsIterator.display(c);

InterfaceVsIterator.display(c.iterator());

}

/* Output:

0:Rat 1:Manx 2:Cymric 3:Mutt 4:Pug 5:Cymric 6:Pug

7:Manx

0:Rat 1:Manx 2:Cymric 3:Mutt 4:Pug 5:Cymric 6:Pug

7:Manx