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