How to get the size of an ArrayList in Java

import java.util.ArrayList; 

public class ArrayListSize {

 public static void main(String[] args) {
 //Create ArrayList
 ArrayList arraylist = new ArrayList(); 
 
 //add the elements to ArrayList
 arraylist.add(1); 
 arraylist.add(11); 
 arraylist.add(22); 
 
 //ArrayList size before
 System.out.println("Before: "+ arraylist.size()); 
 
 arraylist.add(33); 
 //size of the ArrayList after adding an element
 System.out.println("After: "+ arraylist.size()); 
 }
}

Before: 3
after: 4