/*
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
*/
