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ArrayList get(index) Method in Java with Examples

Last Updated : 10 Dec, 2024
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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 
// 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);
    }
}

Output
[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 
// 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(...

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