Array setByte() method in Java
Last Updated :
28 Mar, 2022
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 class
import 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 class
import 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 class
import 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 class
import 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
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