39 lines
1.1 KiB
Java
39 lines
1.1 KiB
Java
// collections/CollectionSequence.java
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// (c)2017 MindView LLC: see Copyright.txt
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// We make no guarantees that this code is fit for any purpose.
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// Visit http://OnJava8.com for more book information.
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import typeinfo.pets.*;
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import java.util.*;
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public class CollectionSequence
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extends AbstractCollection<Pet> {
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private Pet[] pets = Pets.array(8);
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@Override
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public int size() { return pets.length; }
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@Override
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public Iterator<Pet> iterator() {
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return new Iterator<Pet>() { // [1]
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private int index = 0;
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@Override
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public boolean hasNext() {
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return index < pets.length;
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}
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@Override
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public Pet next() { return pets[index++]; }
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@Override
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public void remove() { // Not implemented
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throw new UnsupportedOperationException();
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}
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};
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}
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public static void main(String[] args) {
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CollectionSequence c = new CollectionSequence();
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InterfaceVsIterator.display(c);
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InterfaceVsIterator.display(c.iterator());
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}
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}
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/* Output:
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0:Rat 1:Manx 2:Cymric 3:Mutt 4:Pug 5:Cymric 6:Pug 7:Manx
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0:Rat 1:Manx 2:Cymric 3:Mutt 4:Pug 5:Cymric 6:Pug 7:Manx
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*/
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