Add an element to specified index of ArrayList : ArrayList « Collections « Java Tutorial

1. Java Tutorial
2. Collections
3. ArrayList

import java.util.ArrayList;

public class Main {
  public static void main(String[] args) {
    ArrayList<String> arrayList = new ArrayList<String>();
    arrayList.add("1");
    arrayList.add("2");
    arrayList.add("3");

    arrayList.add(1, "INSERTED");
    for (String str: arrayList)
      System.out.println(str);
  }
}
/*
1
INSERTED
2
3
*/