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Java ArrayList size() Method with Example

ArrayList Class size() method: Here, we are going to learn about the size() method of ArrayList Class with its syntax and example.
Submitted by Preeti Jain, on January 18, 2020

ArrayList Class size() method

  • size() method is available in java.util package.
  • size() method is used to return the size (i.e. no. of elements stored) in this Arraylist.
  • size() method is a non-static method so it is accessible with the class object and if we try to access the method with the class name then we will get an error.
  • size() method does not throw an exception at the time of returning the size of this Arraylist.

Syntax:

     public int size();

Parameter(s):

  • It does not accept any parameter.

Return value:

In the first case, the return type of the method is int, it returns the size of this Arraylist.

Example:

// Java program to demonstrate the example 
// of int size() method of ArrayList

import java.util.*;

public class SizeOfArrayList {
    public static void main(String[] args) {
        // Create an ArrayList with initial 
        // capacity of storing elements

        ArrayList arr_l = new ArrayList(10);

        // By using add() method is to add 
        // elements in this ArrayList
        arr_l.add("C");
        arr_l.add("C++");
        arr_l.add("JAVA");
        arr_l.add("DOTNET");
        arr_l.add("PHP");

        // Display ArrayList
        System.out.println("ArrayList Elements :" + arr_l);

        int size = arr_l.size();

        // Display ArrayList Size
        System.out.println("arr_l.size() : " + size);
    }
}

Output

ArrayList Elements :[C, C++, JAVA, DOTNET, PHP]
arr_l.size() : 5






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