ArrayList get(index) Method in Java with Examples (original) (raw)

Last Updated : 10 Dec, 2024

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(...