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/* Add or insert an element to ArrayList using Java ListIterator Example This Java Example shows how to add or insert an element while traversing through elements of ArrayList using Java ListIterator. */ import java.util.ListIterator; import java.util.ArrayList; public class AddAnElementUsingListIteratorExample { 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 void add(Object o) method of ListIterator to add or insert an element to List. It adds an element just before the element that would have been returned by next method call and after the element that would have returned by previous call. */ listIterator.next(); //Add an element listIterator.add("Added Element"); /* add method can throw UnsupportedOperationException if add operation is not supported by this ListIterator. Please also note that, sebsequent call to previous method after adding an element, would return the newly added element. */ System.out.println("After inserting element, ArrayList contains"); for(int intIndex = 0; intIndex < aList.size(); intIndex++) System.out.println(aList.get(intIndex)); } } /* Output would be After inserting element, ArrayList contains 1 Added Element 2 3 4 5 */ |
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