Java – ListIterator

ListIterator:

• It is an interface
• listIterator() method returns ListIterator object.
• Using ListIterator, we can iterate elements,
  • In Forward direction
  • In Backward direction
  • From specified index value

Iterator List in Forward Direction using hasNext() and next() methods:

List<Integer> list = new ArrayList<Integer>(); for(int i=1 ; i<=5 ; i++) {             list.add(i*5); } ListIterator<Integer> itr = list.listIterator(); while(itr.hasNext()) {             System.out.println(itr.next()); }

Iterator List in Backward Direction using hasPrevious() and previous() methods:

List<Integer> list = new ArrayList<Integer>(); for(int i=1 ; i<=5 ; i++) {             list.add(i*5); } ListIterator<Integer> itr = list.listIterator(list.size()); while(itr.hasPrevious()) {             System.out.println(itr.previous()); }

Display list from specified index value:

List<Integer> list = new ArrayList<Integer>(); for(int i=1 ; i<=10 ; i++) {             list.add(i*5); } ListIterator<Integer> itr = list.listIterator(5); while(itr.hasNext()) {             System.out.println(itr.next()); }