/**
 Programmer: Cuming Mary Grace
 Program name: Arraylist(Iterator)
 Date Started:MArch 2,2009
 Date Finished: MArch 11, 2009
 Purpose of the programm: To know more about Iterator
 */

import java.util.ArrayList;
import java.util.Iterator;
 import java.util.ListIterator;
 
public class IteratorSample {
    
     public static void main(String[] args) {

  ArrayList arrayList = new ArrayList();    // this create an Arraylist for the Animal
                 
  arrayList.add("cat");        //it Add elements to Arraylist
  arrayList.add("dog");
  arrayList.add("rat");
  arrayList.add("bat");
  arrayList.add("bug");
   
  //in order to get the object in the arraylist we used the Iterator() method.
  ListIterator itr = arrayList.listIterator();
 
 
  //use hasNext() which Returns true if the iteration has more elements
  //and next()method which Returns the next element in the iteration in order to iterate through the elements
   
  System.out.println("Animal ArrayList elements...");
  while(itr.hasNext())
  System.out.println(itr.next());
   
  
  /*
  Use hasPrevious() and previous() methods of ListIterator to iterate through
  the elements in backward direction.
  */
  System.out.println("Iterating through ArrayList elements in backward direction...");
  while(itr.hasPrevious())
  System.out.println(itr.previous());
 
  }
}