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

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// collections/IterableClass.java

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

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

// Anything Iterable works with for-in

import java.util.*;

public class IterableClass implements Iterable<String> {

protected String[] words = ("And that is how " +

"we know the Earth to be banana-shaped."

).split(" ");

@Override public Iterator<String> iterator() {

return new Iterator<String>() {

private int index = 0;

@Override public boolean hasNext() {

return index < words.length;

}

@Override

public String next() { return words[index++]; }

@Override

public void remove() { // Not implemented

throw new UnsupportedOperationException();

}

};

}

public static void main(String[] args) {

for(String s : new IterableClass())

System.out.print(s + " ");

}

/* Output:

And that is how we know the Earth to be banana-shaped.