Open In App
Related Articles

Array setByte() method in Java

Improve
Improve
Improve
Like Article
Like
Save Article
Save
Report issue
Report

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


Last Updated : 28 Mar, 2022
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads