Java ArrayList size()

The Java ArrayList size() method returns the number of elements present in the arraylist.

The syntax of the size() method is:

arraylist.size()

Here, arraylist is an object of the ArrayList class.


size() Parameters

The size() method does not take any parameters.


size() Return Value

  • returns the number of elements present in the arraylist.

Example: Get the Length of an ArrayList

import java.util.ArrayList;

class Main {
    public static void main(String[] args) {
        // create an ArrayList
        ArrayList<String> languages = new ArrayList<>();

        // insert element to the arraylist
        languages.add("JavaScript");
        languages.add("Java");
        languages.add("Python");
        System.out.println("ArrayList: " + languages);

        // get the number of elements of arraylist
        int size = languages.size();
        System.out.println("Length of ArrayList: " + size);
    }
}

Output

ArrayList: [JavaScript, Java, Python]
Length of ArrayList: 3

In the above example, we have created a arraylist named languages. Here, we have used the size() method to get the number of elements present in the arraylist.