Java.util.Arrays.fill(Object[], Object) Method

Description

The java.util.Arrays.fill(Object[] a, Object val) method assigns the specified Object reference to each element of the specified array of Objects.

Declaration

Following is the declaration for java.util.Arrays.fill() method

public static void fill(Object[] a, Object 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 value.

Exception

• ArrayStoreException -- if the specified value is not of a runtime type that can be stored in the specified array.

Example

The following example shows the usage of java.util.Arrays.fill() method.

package com.tutorialspoint;

import java.util.Arrays;

public class ArrayDemo {

  public static void main(String[] args) {
    
    // initializing Object array
    Object arr[] = new Object[] {10.5, 5.6, 4.7, 2.9, 9.7};
    
    // let us print the values
    System.out.println("Actual values: ");
    for (Object value : arr) {
      System.out.println("Value = " + value);
    }

    // using fill for placing 12.2
    Arrays.fill(arr, 12.2);

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

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

Actual values:
Value = 10.5
Value = 5.6
Value = 4.7
Value = 2.9
Value = 9.7
New values after using fill() method:
Value = 12.2
Value = 12.2
Value = 12.2
Value = 12.2
Value = 12.2