Get Previous and next index using Java ListIterator Example

/*
  Get Previous and next index using Java ListIterator Example
  This Java Example shows how to get previous and next index while traversing through
  elements of ArrayList using Java ListIterator.
*/
 
import java.util.ListIterator;
import java.util.ArrayList;
 
public class GetPreviousAndNextIndexListIteratorExample {
 
  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();
 
    /*
      Use nextIndex and previousIndex methods of ListIterator to get next and
      previous index from the current position in the list.
    */ 
 
    System.out.println("Previous Index is : " + listIterator.previousIndex());   
    System.out.println("Next Index is : " + listIterator.nextIndex());
 
    //advance current position by one using next method
    listIterator.next();
 
    System.out.println("After increasing current position by one element : ");
    System.out.println("Previous Index is : " + listIterator.previousIndex());   
    System.out.println("Next Index is : " + listIterator.nextIndex());
 
 
  }
}
 
/*
Previous Index is : -1
Next Index is : 0
After increasing current position by one element :
Previous Index is : 0
Next Index is : 1
*/