Fill a Byte Array in Java

Declaration :

public static void fill(byte[] a, byte val)

1	public static void fill(byte[] a, byte val)

Explanation :

Purpose	The java.util.Arrays.fill(byte[] a byte val) method assigns the specified byte value to each element of the specified array of bytes.
Parameters	a ===> This is the array to be filled.
	val ===> This is the value to be stored in all elements of the array.
Return Value	This method does not return any value.
Exception	NA

Java Program : Example

Below example will explain java.util.Arrays.fill() method.

package com.c4learn;
import java.util.Arrays;
public class ArrayDemo {
	public static void main(String[] args) {
		// Initialize byte array
		byte arr[] = new byte[] { 10, 20, 30 };
		// Print the original array
		System.out.println("Original Array : ");
		for (byte val : arr) {
			System.out.println("Original element is " + val);
		}
		// Use 'fill' to place '15'
		// Convert integer to byte
		Arrays.fill(arr, (byte) 15);
		// Print the new array
		System.out.println("\nNew Array is : ");
		for (byte val : arr) {
			System.out.println("New element is " + val);
		}
	}
}

package com.c4learn;

import java.util.Arrays;

public class ArrayDemo {

public static void main(String[] args) {

// Initialize byte array

byte arr[] = new byte[] { 10, 20, 30 };

// Print the original array

System.out.println("Original Array : ");

for (byte val : arr) {

System.out.println("Original element is " + val);

}

// Use 'fill' to place '15'

// Convert integer to byte

Arrays.fill(arr, (byte) 15);

// Print the new array

System.out.println("\nNew Array is : ");

for (byte val : arr) {

System.out.println("New element is " + val);

}

Output of Program :

Original Array : 
Original element is 10
Original element is 20
Original element is 30
New Array is : 
New element is 15
New element is 15
New element is 15

Original Array :

Original element is 10

Original element is 20

Original element is 30

New Array is :

New element is 15

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