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 + " ");
}
}
}
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