Array setInt() method in Java
Last Updated :
10 Nov, 2022
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The java.lang.reflect.Array.setInt() is an inbuilt method in Java and is used to set a specified int value to a specified index of a given object array.
Syntax:
Java
Output
Java
Output
Java
Output
Array.setInt(Object []array, int index, int value)Parameter:
- array: This is an array of type Object which is to be updated.
- index: This is the index of the array which is to be updated.
- value: This is the int value that is to be set at the given index of the given array.
- 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 Array.setInt() method: Program 1 :
// Java code to demonstrate setInt() method of Array class
import java.lang.reflect.Array;
public class GfG {
// main method
public static void main(String[] args)
{
// Declaring and defining Integer array
int b[] = { 1, 2, 3, 4 };
System.out.print("Before Set : ");
// printing the array
for (Integer x : b) {
System.out.print(x + " ");
}
int value = 10;
// set method of class Array
Array.setInt(b, 1, value);
System.out.print("\nAfter Set : ");
// printing array
for (Integer x : b) {
System.out.print(x + " ");
}
}
}
Before Set : 1 2 3 4 After Set : 1 10 3 4Program 2 : To demonstrate java.lang.NullPointerException.
// Java code to demonstrate setInt() method of Array class
import java.lang.reflect.Array;
public class GfG {
// main method
public static void main(String[] args)
{
// Declaring and defining Integer array to null
Integer b[] = null;
try {
Array.setInt(b, 5, 10);
}
catch (Exception e) {
System.out.println("Exception : " + e);
}
}
}
Exception : java.lang.NullPointerExceptionProgram 3 : To demonstrate java.lang.ArrayIndexOutOfBoundsException.
// Java code to demonstrate setInt() method of Array class
import java.lang.reflect.Array;
public class GfG {
// main method
public static void main(String[] args)
{
// Declaring and defining Integer array
Integer b[] = { 1, 2, 3, 4 };
try {
Array.setInt(b, 5, 10);
}
catch (Exception e) {
System.out.println("Exception : " + e);
}
}
}
Exception : java.lang.ArrayIndexOutOfBoundsExceptionProgram 4 : To demonstrate java.lang.IllegalArgumentException.
// Java code to demonstrate setInt() method of Array class
import java.lang.reflect.Array;
public class GfG {
// main method
public static void main(String[] args)
{
// Declaring and defining Integer variable
Integer b = 1;
try {
Array.setInt(b, 5, 10);
}
catch (Exception e) {
System.out.println("Exception : " + e);
}
}
}
Exception : java.lang.IllegalArgumentException: Argument is not an array
