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/* Add an element to specified index of Java ArrayList Example This Java Example shows how to add an element at specified index of java ArrayList object using add method. */ import java.util.ArrayList; public class AddElementToSpecifiedIndexArrayListExample { public static void main(String[] args) { //create an ArrayList object ArrayList arrayList = new ArrayList(); //Add elements to Arraylist arrayList.add("1"); arrayList.add("2"); arrayList.add("3"); /* To add an element at the specified index of ArrayList use void add(int index, Object obj) method. This method inserts the specified element at the specified index in the ArrayList. */ arrayList.add(1,"INSERTED ELEMENT"); /* Please note that add method DOES NOT overwrites the element previously at the specified index in the list. It shifts the elements to right side and increasing the list size by 1. */ System.out.println("ArrayList contains..."); //display elements of ArrayList for(int index=0; index < arrayList.size(); index++) System.out.println(arrayList.get(index)); } } /* Output would be ArrayList contains... 1 INSERTED ELEMENT 2 3 */ |
just a cast to be 100% correct.
ArrayList arrayList<string> = new ArrayList();
how to use ArrayList for random insertion or deletion?