Java ListIterator Example

The ListIterator interface is a special kind of iterator designed to iterate over lists. It provides functionality to iterates a list in both direction. Here is one example to iterate a list in reverse order using ListIterator.

Example

package mycollectiontest;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class ListIterator {

   public static void main(String[] args) {
      List<String> list = new ArrayList<String>();
      list.add("One");
      list.add("Two");
      list.add("Three");
      list.add("Four");
      list.add("Five");
      // Iterator allows only one direction
      Iterator<String> it = list.iterator();
      while (it.hasNext()) {
         System.out.println(it.next());

      }
      // ListIterator allows traversing both direction
      java.util.ListIterator<String> listIterator = list.listIterator(list.size());
      while (listIterator.hasPrevious()) {
         System.out.println(listIterator.previous());
      }
   }

}

Output

One
Two
Three
Four
Five
Five
Four
Three
Two
One