ArrayList get() method – Get element at index from ArrayList

Learn how to get the element from an ArrayList. We will be using ArrayList.get() method to get the object at the specified index of the arraylist.

1. ArrayList get() method

ArrayList.get(int index) method returns the element at the specified position 'index' in the list.

1.1. get() method syntax

public Object get( int index );

1.2. get() method parameter

index – index of the element to return.

A valid index will always be from 0 (inclusive) to size of arraylist (exclusive). For example, if arraylist holds 10 objects than a valid argument index will be between 0 to 9 (both inclusive).

An invalid index argument will cause IndexOutOfBoundsException error.

Exception in thread "main" java.lang.IndexOutOfBoundsException: Index: 4, Size: 4
	at java.util.ArrayList.rangeCheck(ArrayList.java:653)
	at java.util.ArrayList.get(ArrayList.java:429)
	at com.howtodoinjava.example.ArrayListExample.main(ArrayListExample.java:12)

1.3. indexOf() return value

The method returns the reference of the object present at the specified index.

2. ArrayList get() example – Get value at index in ArrayList

Java program for how to get an object from ArrayList by it’s index location. In this example, we want to get the object stored at index location 0 and 1.

Note – Please note that arraylist index starts from 0.

import java.util.ArrayList;
import java.util.Arrays;

public class ArrayListExample 
{
    public static void main(String[] args) 
    {
        ArrayList<String> list = new ArrayList<>(Arrays.asList("alex", "brian", "charles", "dough"));
        
        String firstName = list.get(0);         //alex
        String secondName = list.get(1);        //brian
        
        System.out.println(firstName);
        System.out.println(secondName);
    }
}

Program output.

alex
brian

Happy Learning !!

Read More:

A Guide to Java ArrayList
ArrayList Java Docs