36 lines
1.0 KiB
Java
36 lines
1.0 KiB
Java
// generics/IterableFibonacci.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://mindviewinc.com/Books/OnJava/ for more book information.
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// Adapt the Fibonacci class to make it Iterable.
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import java.util.*;
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public class IterableFibonacci
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extends Fibonacci implements Iterable<Integer> {
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private int n;
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public IterableFibonacci(int count) { n = count; }
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@Override
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public Iterator<Integer> iterator() {
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return new Iterator<Integer>() {
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@Override
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public boolean hasNext() { return n > 0; }
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@Override
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public Integer next() {
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n--;
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return IterableFibonacci.this.get();
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}
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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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for(int i : new IterableFibonacci(18))
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System.out.print(i + " ");
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}
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}
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/* Output:
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1 1 2 3 5 8 13 21 34 55 89 144 233 377 610 987 1597 2584
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*/
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