Array get() Method in Java

The java.lang.reflect.Array.get() is an inbuilt method in Java and is used to return the element at a given index from the specified Array.

Syntax

Array.get(Object []array, int index)

Parameters : This method accepts two mandatory parameters:

  • array: The object array whose index is to be returned.
  • index: The particular index of the given array. The element at ‘index’ in the given array is returned.

Return Value: This method returns the element of the array as type of Object class.

Exceptions: This method throws following exceptions:



  • NullPointerException – when the array is null.
  • IllegalArgumentException – when the given object array is not an Array.
  • ArrayIndexOutOfBoundsException – if the given index is not in the range of the size of the array.

Below programs illustrate the get() method of Array class:

Program 1:

filter_none

edit
close

play_arrow

link
brightness_4
code

import java.lang.reflect.Array;
  
public class GfG {
    // main method
    public static void main(String[] args)
    {
        // Declaring and defining an int array
        int a[] = { 1, 2, 3, 4, 5 };
  
        // Traversing the array
        for (int i = 0; i < 5; i++) {
  
            // Array.get method
            // Note : typecasting is essential
            // as the return type in Object.
            int x = (int)Array.get(a, i);
  
            // Printing the values
            System.out.print(x + " ");
        }
    }
}

chevron_right


Output:

1 2 3 4 5

Program 2: To demonstrate ArrayIndexOutOfBoundsException.

filter_none

edit
close

play_arrow

link
brightness_4
code

import java.lang.reflect.Array;
  
public class GfG {
    // main method
    public static void main(String[] args)
    {
        // Declaring and defining an int array
        int a[] = { 1, 2, 3, 4, 5 };
  
        try {
            // invalid index
            int x = (int)Array.get(a, 6);
            System.out.println(x);
        }
        catch (Exception e) {
            // throws Exception
            System.out.println("Exception : " + e);
        }
    }
}

chevron_right


Output:

Exception : java.lang.ArrayIndexOutOfBoundsException

Program 3: To demonstrate NullPointerException.

filter_none

edit
close

play_arrow

link
brightness_4
code

import java.lang.reflect.Array;
  
public class GfG {
    // main method
    public static void main(String[] args)
    {
        // Declaring an int array
        int a[];
  
        // array to null
        a = null;
  
        try {
            // null Object array
            int x = (int)Array.get(a, 6);
            System.out.println(x);
        }
        catch (Exception e) {
            // throws Exception
            System.out.println("Exception : " + e);
        }
    }
}

chevron_right


Output:

Exception : java.lang.NullPointerException

Program 4: To demonstrate IllegalArgumentException.

filter_none

edit
close

play_arrow

link
brightness_4
code

import java.lang.reflect.Array;
  
public class GfG {
    // main method
    public static void main(String[] args)
    {
        // int (Not an array)
        int y = 0;
  
        try {
            // illegalArgument
            int x = (int)Array.get(y, 6);
  
            System.out.println(x);
        }
        catch (Exception e) {
            // Throws exception
            System.out.println("Exception : " + e);
        }
    }
}

chevron_right


Output:

Exception : java.lang.IllegalArgumentException: Argument is not an array

Attention reader! Don’t stop learning now. Get hold of all the important Java and Collections concepts with the Fundamentals of Java and Java Collections Course at a student-friendly price and become industry ready.




My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.



Improved By : nidhi_biet