Java Arrays fill(double[], double) Method

Description

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

Declaration

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

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

Description

The Java Arrays fill(double[] a, int fromIndex, int toIndex, double val) method assigns the specified double value to each element of the specified range of the specified array of doubles.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(double[] a, int fromIndex, int toIndex, double val) method

public static void fill(double[] a, int fromIndex, int toIndex, double 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 doubles with Given Values Example

The following example shows the usage of Java Arrays fill(double[], double) method. First, we've created an array of doubles and its elements are printed. Using fill(double[], double) 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 double array
      double arr[] = new double[] { 10.0, 20.0, 15.0 };

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

      double replacement = 0.0;
      
      // using fill for placing value
      Arrays.fill(arr, replacement);

      // let us print the values
      System.out.println("New values after using fill() method: ");
      for (double 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 = 10.0
Value = 20.0
Value = 15.0
New values after using fill() method: 
Value = 0.0
Value = 0.0
Value = 0.0

Filling the Array of double with Given Values Example

The following example shows the usage of Java Arrays fill(double[], int, int, double) method. First, we've created an array of doubles and its elements are printed. Using fill(double[], int, int, double) 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 double array
      double arr[] = new double[] { 10.0, 20.0, 15.0 };

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

      double replacement = 0.0;
      
      // 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 (double 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 = 10.0
Value = 20.0
Value = 15.0
New values after using fill() method: 
Value = 0.0
Value = 0.0
Value = 0.0

Filling the Sub-Array of doubles with Given Values Example

The following example shows the usage of Java Arrays fill(double[], int, int, double) method. First, we've created an array of doubles and its elements are printed. Using fill(double[], int, int, double) 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 double array
      double arr[] = new double[] { 10.0, 20.0, 15.0 };

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

      double replacement = 0.0;
      
      // 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 (double 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 = 10.0
Value = 20.0
Value = 15.0
New values after using fill() method: 
Value = 0.0
Value = 0.0
Value = 15.0
java_util_arrays.htm
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