How to get the size of an ArrayList in Java

Using the ArrayList method size()  you can very easily determine the size of an ArrayList in Java. This method returns the current number of items in an ArrayList.

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()); 
 }
}

Runtime:

Before: 3
after: 4