Fill a Long Array using Index in Java

Declaration :

public static void fill(long[] a, int fromIndex, int toIndex, long val)

1	public static void fill(long[] a, int fromIndex, int toIndex, long val)

Explanation :

Purpose	The java.util.Arrays.fill(long[] a int fromIndex int toIndex long val) method assigns the specified long value to each element of the specified range of the specified array of longs. The range to be filled extends from index fromIndex inclusive to index toIndex exclusive.(If fromIndex==toIndex the range to be filled is empty.).
Parameters	a ===> This is the array to be filled.
	fromIndex ===> This is the index of the first element (inclusive) to be filled with the specified value.
	toIndex ===> This is the index of the last element (exclusive) to be filled with the specified value.
	val ===> This is the value to be stored in all elements of the array.
Return Value	This method does not return any value.
Exception	ArrayIndexOutOfBoundsException — if fromIndex < 0 or toIndex > a.length ,IllegalArgumentException — if fromIndex > toIndex

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 long array
		long arr[] = new long[] { 100, 200, 300, 400, 500 };
		// Print the original array
		System.out.println("Original Array : ");
		for (long val : arr) {
			System.out.println("Original element is " + val);
		}
		// Use fill to place 50 in the range index 1 to 4
		Arrays.fill(arr, 1, 4, 50);
		// Print the new array
		System.out.println("\nNew Array is : ");
		for (long 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 long array

long arr[] = new long[] { 100, 200, 300, 400, 500 };

// Print the original array

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

for (long val : arr) {

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

}

// Use fill to place 50 in the range index 1 to 4

Arrays.fill(arr, 1, 4, 50);

// Print the new array

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

for (long val : arr) {

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

}

Output of Program :

Original Array : 
Original element is 100
Original element is 200
Original element is 300
Original element is 400
Original element is 500
New Array is : 
New element is 100
New element is 50
New element is 50
New element is 50
New element is 500

Original Array :

Original element is 100

Original element is 200

Original element is 300

Original element is 400

Original element is 500

New Array is :

New element is 100

New element is 50

New element is 500

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