Why ListIterator Has add Method But Iterator Does Not Have in Java ?

ListIterator can iterate in the both directions of a Collection. It maintains two pointer for previous and next element. In ListIterator we can use add() method to add an element into the list immediately before the element returned by next() method.

So a subsequent call to next() method will not be affected. And the call to previous() method will return the newly added element.

In Iterator we can only traverse in one direction. So there is no purpose of add() method there.

You May Interest

What is the Reason For Overriding equals Method in Java ?

What are the Disadvantages of Multithreading in Java ?

How Will You Include a Static File in a JSP Page ?

What is the Purpose of Thread Groups in Java ?

What are the Advantages of Multithreading in Java ?