ArrayList.size() in Java

ArrayList.size(): This method is available in java.util.ArrayList class of Java.

Syntax:

int java.util.ArrayList.size()

This method returns the number of elements in this list.

Parameters: NA

Returns: the number of elements in this list.

Exceptions: NA

Approach

Java

import java.util.ArrayList;

public class ArrayListsize {
    public static void main(String[] args) {
        ArrayList<Integer> arr = new ArrayList<>();
        arr.add(1);
        arr.add(2);
        arr.add(3);
        System.out.println(arr.size());

    }
}

Output:

3