Array lists

import java.util.ArrayList;
ArrayList<Integer> myList = new ArrayList<Integer>();
myList.add(0);
myList.remove(0);//Remove at index 0
myList.size();
myList.get(0);//Return element at index 0

// Java program to add elements 
// to an ArrayList 
  
import java.util.*; 
  
public class GFG { 
  
    public static void main(String args[]) 
    { 
        ArrayList<String> al = new ArrayList<>(); 
  
        al.add("Geeks"); 
        al.add("Geeks"); 
        al.add(1, "For"); 
  
        System.out.println(al); 
    } 
} 

import java.util.ArrayList; // import the ArrayList class

ArrayList<String> cars = new ArrayList<String>(); // Create an ArrayList object

// Java program to change elements 
// in an ArrayList 
  
import java.util.*; 
  
public class GFG { 
  
    public static void main(String args[]) 
    { 
        ArrayList<String> al = new ArrayList<>(); 
  
        al.add("Geeks"); 
        al.add("Geeks"); 
        al.add(1, "Geeks"); 
  
        System.out.println("Initial ArrayList " + al); 
  
        al.set(1, "For"); 
  
        System.out.println("Updated ArrayList " + al); 
    } 
}