Array get() Method in Java

Last Updated : 23 Jul, 2020

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:

Java

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 + " ");         }     } }

Output:

  1 2 3 4 5

Program 2: To demonstrate ArrayIndexOutOfBoundsException.

Java

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);         }     } }

Output:

  Exception : java.lang.ArrayIndexOutOfBoundsException

Program 3: To demonstrate NullPointerException.

Java

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);         }     } }

Output:

  Exception : java.lang.NullPointerException

Program 4: To demonstrate IllegalArgumentException.

Java

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);         }     } }

Output:

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

Array getShort() method in Java

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