37 lines
1.1 KiB
Java
37 lines
1.1 KiB
Java
// collections/ListIteration.java
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// (c)2016 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 ListIteration {
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public static void main(String[] args) {
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List<Pet> pets = Pets.list(8);
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ListIterator<Pet> it = pets.listIterator();
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while(it.hasNext())
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System.out.print(it.next() + ", " + it.nextIndex() +
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", " + it.previousIndex() + "; ");
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System.out.println();
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// Backwards:
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while(it.hasPrevious())
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System.out.print(it.previous().id() + " ");
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System.out.println();
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System.out.println(pets);
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it = pets.listIterator(3);
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while(it.hasNext()) {
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it.next();
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it.set(Pets.get());
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}
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System.out.println(pets);
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}
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}
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/* Output:
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Rat, 1, 0; Manx, 2, 1; Cymric, 3, 2; Mutt, 4, 3; Pug, 5, 4;
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Cymric, 6, 5; Pug, 7, 6; Manx, 8, 7;
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7 6 5 4 3 2 1 0
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[Rat, Manx, Cymric, Mutt, Pug, Cymric, Pug, Manx]
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[Rat, Manx, Cymric, Cymric, Rat, EgyptianMau, Hamster,
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EgyptianMau]
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*/
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