Traverse through ArrayList in reverse direction using Java ListIterator Example


/*
  Traverse through ArrayList in reverse direction using Java ListIterator Example
  This Java Example shows how to iterate through an ArrayList object in reverse direction
  using Java ListIterator's previous and hasPrevious methods .
*/

import java.util.ListIterator;
import java.util.ArrayList;

public class TraverseReverseUsingListIteratorExample {

 
public static void main(String[] args) {
   
//create an object of ArrayList
   
ArrayList aList = new ArrayList();
   
   
//Add elements to ArrayList object
   
aList.add("1");
    aList.add
("2");
    aList.add
("3");
    aList.add
("4");
    aList.add
("5");
   
   
//Get an object of ListIterator using listIterator() method
   
ListIterator listIterator = aList.listIterator();

   
//Traverse in forward direction   
   
System.out.println("Traversing ArrayList in forward direction using ListIterator");
   
while(listIterator.hasNext())
     
System.out.println(listIterator.next());
     
   
/*
      Traverse the ArrayList in reverse direction using hasPrevious and previous
      methods of ListIterator. hasPrevious method returns true if ListIterator has more
      elements to traverse in reverse direction. Previous method returns previous element
      in the list.
    */
   
System.out.println("Traversing ArrayList in reverse direction using ListIterator");
   
while(listIterator.hasPrevious())
     
System.out.println(listIterator.previous());
     
 
}
}

/*
Traversing ArrayList in forward direction using ListIterator
1
2
3
4
5
Traversing ArrayList in reverse direction using ListIterator
5
4
3
2
1
*/