Java Collection Tutorial - Java ArrayDeque .descendingIterator ()

• Back to ArrayDeque  ↑

Syntax

ArrayDeque.descendingIterator() has the following syntax.

public Iterator <E> descendingIterator()

Example

In the following code shows how to use ArrayDeque.descendingIterator() method.

/*w  w  w .  j a va  2 s  .com*/


import java.util.ArrayDeque;
import java.util.Deque;
import java.util.Iterator;

public class Main {
   public static void main(String[] args) {
      
     
     Deque<Integer>  deque = new ArrayDeque<Integer> (8);

     
     deque.add(3);
     deque.add(4);
     deque.add(25);
     deque.add(1);

     //iterator() is used to print all the elements
     //next() returns the next element on each iteration
     System.out.println("printing elements using iterator:");
   
     for(Iterator itr = deque.iterator();itr.hasNext();)  {
        System.out.println(itr.next());
     }

     //descendingIterator() is used to print the elements in reverse order
     //next() returns the next element on each iteration
     System.out.println("printing elements in reverse order:");
   
     for(Iterator descItr = deque.descendingIterator();descItr.hasNext();) {
        System.out.println(descItr.next());
     }
   }
 }

The code above generates the following result.

• Back to ArrayDeque  ↑