OnJava8-Examples/holding/MultiIterableClass.java

//: holding/MultiIterableClass.java
// <20>2015 MindView LLC: see Copyright.txt
// Adding several Adapter Methods.
import java.util.*;

public class MultiIterableClass extends IterableClass {
  public Iterable<String> reversed() {
    return () -> new Iterator<String>() {
      int current = words.length - 1;
      @Override
      public boolean hasNext() { return current > -1; }
      @Override
      public String next() { return words[current--]; }
      @Override
      public void remove() { // Not implemented
        throw new UnsupportedOperationException();
      }
    };
  }
  public Iterable<String> randomized() {
    return () -> {
      List<String> shuffled =
              new ArrayList<>(Arrays.asList(words));
      Collections.shuffle(shuffled, new Random(47));
      return shuffled.iterator();
    };
  }
  public static void main(String[] args) {
    MultiIterableClass mic = new MultiIterableClass();
    for(String s : mic.reversed())
      System.out.print(s + " ");
    System.out.println();
    for(String s : mic.randomized())
      System.out.print(s + " ");
    System.out.println();
    for(String s : mic)
      System.out.print(s + " ");
  }
} /* Output:
banana-shaped. be to Earth the know we how is that And
is banana-shaped. Earth that how the be And we know to
And that is how we know the Earth to be banana-shaped.
*///:~