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Even simple iterators built this way tend to be significantly bulkier than those using generators, with a lot of [[boilerplate code]].
The original example above could be written in '''Java 7''' as:
<source lang="Java">
// Iterator implemented as anonymous class. This uses generics but doesn't need to.
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</source>
An infinite Fibonacci sequence could also be written int '''Java 7''' as an Iterator:
<source lang="java">
Iterable<Integer> fibo = new Iterable<Integer>() {
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Also the Fibonacci sequence could also be written using '''java 8''' Stream interface:
<source lang="java">
Stream.generate(new Supplier<Integer>() {
int a = 1;
int b = 2;
public Integer get() {
int temp = a;
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</source>
Or get an Iterator from the '''Java 8''' super-interface BaseStream of Stream interface.
<source lang="java">
public Iterable<Integer> fibonacci(int limit){
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