Java Arrays fill(long[], long) Method

Description

The Java Arrays fill(long[] a, long val) method assigns the specified long value to each element of the specified array of longs.

Declaration

Following is the declaration for java.util.Arrays.fill(long[] a, long val) method

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

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 Arrays fill(long[] a, int fromIndex, int toIndex, long val) Method

Description

The Java 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.)

Declaration

Following is the declaration for java.util.Arrays.fill(long[] a, int fromIndex, int toIndex, long val) method

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

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

Filling the Array of longs with Given Values Example

The following example shows the usage of Java Arrays fill(long[], long) method. First, we've created an array of longs and its elements are printed. Using fill(long[], long) method, we're filling the array with a give value and then updated array elements are printed again.

package com.tutorialspoint;

import java.util.Arrays;

public class ArrayDemo {
   public static void main(String[] args) {

      // initializing long array
      long arr[] = new long[] { 10L , 20L, 15L };

      // let us print the values
      System.out.println("Actual values: ");
      for (long value : arr) {
         System.out.println("Value = " + value);
      }

      long replacement = 0L;
      
      // using fill for placing value
      Arrays.fill(arr, replacement);

      // let us print the values
      System.out.println("New values after using fill() method: ");
      for (long value : arr) {
         System.out.println("Value = " + value);
      }
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Actual values: 
Value = 10
Value = 20
Value = 15
New values after using fill() method: 
Value = 0
Value = 0
Value = 0

Filling the Sub-Array of longs with Given Values Example

The following example shows the usage of Java Arrays fill(long[], int, int, long) method. First, we've created an array of longs and its elements are printed. Using fill(long[], int, int, long) method method, we're filling the array with a give value and then updated array elements are printed again.

package com.tutorialspoint;

import java.util.Arrays;

public class ArrayDemo {
   public static void main(String[] args) {

      // initializing long array
      long arr[] = new long[] { 10L , 20L, 15L };

      // let us print the values
      System.out.println("Actual values: ");
      for (long value : arr) {
         System.out.println("Value = " + value);
      }

      long replacement = 0L;
      
      // using fill for placing value from index 0 to 3
      Arrays.fill(arr, 0, 3, replacement);

      // let us print the values
      System.out.println("New values after using fill() method: ");
      for (long value : arr) {
         System.out.println("Value = " + value);
      }
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Actual values: 
Value = 10
Value = 20
Value = 15
New values after using fill() method: 
Value = 0
Value = 0
Value = 0

Filling the Sub-Array of longs with Given Values Example

The following example shows the usage of Java Arrays fill(long[], int, int, long) method. First, we've created an array of longs and its elements are printed. Using fill(long[], int, int, long) method method, we're filling the subarray of array with a give value and then updated array elements are printed again.

package com.tutorialspoint;

import java.util.Arrays;

public class ArrayDemo {
   public static void main(String[] args) {

      // initializing long array
      long arr[] = new long[] { 10L , 20L, 15L };

      // let us print the values
      System.out.println("Actual values: ");
      for (long value : arr) {
         System.out.println("Value = " + value);
      }

      long replacement = 0L;
      
      // using fill for placing value from index 0 to 2
      Arrays.fill(arr, 0, 2, replacement);

      // let us print the values
      System.out.println("New values after using fill() method: ");
      for (long value : arr) {
         System.out.println("Value = " + value);
      }
   }
}

Output

Let us compile and run the above program, this will produce the following result −

Actual values: 
Value = 10
Value = 20
Value = 15
New values after using fill() method: 
Value = 0
Value = 0
Value = 15
java_util_arrays.htm
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