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  1. /* package whatever; // don't place package name! */
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. /* Name of the class has to be "Main" only if the class is public. */
  8. class Ideone
  9. {
  10. 	public static void main (String[] args) throws java.lang.Exception
  11. 	{
  12. 		for (int i : new Seii(2, 42)) {
  13. 			System.out.println(i);
  14. 		}
  15. 	}
  16. }
  17.  
  18. class Seii implements Iterable<Integer> {
  19. 	private int current;
  20.     private int max;
  21.     public Seii(int current, int max) {
  22.         this.current = current;
  23.         this.max = max;
  24.     }
  25. 	@Override
  26. 	public Iterator<Integer> iterator() {
  27. 		return new SeiIterator(current, max);
  28. 	}
  29. }
  30.  
  31. class SeiIterator implements Iterator<Integer> {
  32.     private int current;
  33.     private int max;
  34.     public SeiIterator(int current, int max) {
  35.         this.current = current;
  36.         this.max = max;
  37.     }
  38.     @Override
  39.     public boolean hasNext() {
  40.         return current < max;
  41.     }
  42.     @Override
  43.     public Integer next() {
  44.         current = (3*current)/2;
  45.         return current;
  46.     }
  47.     @Override
  48.     public void remove() {
  49.         throw new UnsupportedOperationException();
  50.     }
  51. }
Success #stdin #stdout 0.1s 320320KB
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Standard input is empty
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3
4
6
9
13
19
28
42
https://ideone.com/NfxWw8
language:
Java (HotSpot 12)
created:
10 years ago
visibility:
public

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