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:Â
Java
// Java code to demonstrate// setByte() method of Array classÂ
import java.lang.reflect.Array;public class GfG {    // main method    public static void main(String[] args)    {Â
        // Declaring and defining Byte array        byte b[] = { 1, 2, 3, 4 };Â
        System.out.print("Before Set : ");Â
        // printing the array        for (byte x : b) {            System.out.print(x + " ");        }        byte value = 10;Â
        // set method of class Array        Array.setByte(b, 1, value);Â
        System.out.print("\nAfter Set : ");Â
        // printing array        for (byte x : b) {            System.out.print(x + " ");        }    }} |
Program 2: To demonstrate java.lang.NullPointerExceptionÂ
Java
// Java code to demonstrate// setByte() method of Array classÂ
import java.lang.reflect.Array;public class GfG {    // main method    public static void main(String[] args)    {Â
        // Declaring and defining Byte array to null        byte b[] = null;Â
        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.ArrayIndexOutOfBoundsExceptionÂ
Java
// Java code to demonstrate// setByte() method of Array classÂ
import java.lang.reflect.Array;public class GfG {    // main method    public static void main(String[] args)    {Â
        // Declaring and defining Byte array        byte b[] = { 1, 2, 3, 4 };Â
        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.IllegalArgumentExceptionÂ
Java
// Java code to demonstrate// setByte() method of Array classÂ
import java.lang.reflect.Array;public class GfG {    // main method    public static void main(String[] args)    {Â
        // Declaring and defining Byte variable        byte b = 1;Â
        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
