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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. 		MyLinkedList<Integer> l = new MyLinkedList<>();
  13. 		for (Integer v : l) {
  14. 			System.out.println(v);
  15. 		}
  16. 	}
  17. }
  18.  
  19. class MyLinkedList<T> implements Iterable<T> {
  20.  
  21.     MyListNode head;
  22.  
  23.     class MyListNode {
  24.     	public T value;
  25.     	public MyListNode next;
  26.     }
  27.  
  28.     public Iterator<T> iterator() {
  29.         return new MyLinkedListIterator();
  30.     }
  31.  
  32.     private class MyLinkedListIterator implements Iterator<T> {
  33.  
  34.         private MyListNode curr;
  35.  
  36.         public MyLinkedListIterator() {
  37.             this.curr = MyLinkedList.this.head;
  38.         }
  39.  
  40.         public boolean hasNext() {
  41.             return this.curr != null;
  42.         }
  43.  
  44.         public T next() {
  45.             if (this.hasNext()) {
  46.                 T value = curr.value;
  47.                 curr = curr.next;
  48.                 return value;
  49.             }
  50.             throw new NoSuchElementException();
  51.         }
  52.  
  53.         public void remove() {
  54.             throw new UnsupportedOperationException();
  55.         }
  56.     }
  57. }	
  58.  
Success #stdin #stdout 0.04s 711168KB
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https://ideone.com/E6OTTG
language:
Java (12.0.1)
created:
9 years ago
visibility:
public

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