ArrayList get(index) Method in Java with Examples

The get(index) method of ArrayList in Java is used to retrieve the element at the specified index within the list.

Example 1: Here, we will use the get() method to retrieve an element at a specific index in an ArrayList of integers.

// Java program to demonstrate the working of // get() method in ArrayList import java.util.ArrayList; public class GFG {  public static void main(String[] args) {    // Creating an ArrayList of Integers  ArrayList<Integer> arr = new ArrayList<Integer>(3);  // Adding elements to the ArrayList  arr.add(10);  arr.add(20);  arr.add(30);  System.out.println("" + arr);  // Getting the element at index 2  int e = arr.get(2);  System.out.println("The element at index 2 is " + e);  } } 

[10, 20, 30] The element at index 2 is 30 

Syntax of get(index) Method

get(int index)

• Parameter: The index of the element to be returned. It is of data-type int.
• Return Type: The element at the specified index in the given list.

If we try to access an index that is out of range i.e., index < 0 or index >= size(), an IndexOutOfBoundsException will be thrown.

Example 2: Here, we will demonstrate the error when attempting to access an index that is out of range.

// Java program to demonstrate error generated // while using get() method in ArrayList import java.util.ArrayList; public class GFG {  public static void main(String[] args) {    // Creating an ArrayList of Integers  ArrayList<Integer> arr = new ArrayList<Integer>(4);  // Adding elements to the ArrayList  arr.add(10);  arr.add(20);  arr.add(30);  arr.add(40);  // Trying to access an element   // at an invalid index  int e = arr.get(5);   // Printing the element at   // index 5 (will throw exception)  System.out.println("The element at index 5 is " + e);  } } 

Output: 

Hangup (SIGHUP)
Exception in thread "main" java.lang.IndexOutOfBoundsException: Index 5 out of bounds for length 4
at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64)
at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70)
at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:248)
at java.base/java.util.Objects.checkIndex(Objects.java:372)
at java.base/java.util.ArrayList.get(ArrayList.java:459)
at GFG.main(...