HashSet toArray(K[]) in Java

toArray(K[]): This method is available in java.util.HashSet class of Java.

Syntax:

<K> K[] java.util.HashSet.toArray(K[] a)

This method takes one argument. This method returns an array containing all of the elements in this set; the runtime type of the returned array is that of the specified array.

Parameters: One parameter is required for this method.

a: the array into which the elements of this set are to be stored, if it is big enough; otherwise, a new array of the same runtime type is allocated for this purpose.

Returns: an array containing all the elements in this set.

Exceptions: NA

Approach

Java

import java.util.Arrays;
import java.util.HashSet;

public class HashSettoArray3 {
    public static void main(String[] args) {

        HashSet<String> hashSet = new HashSet<String>();

        hashSet.add("Hello");
        hashSet.add("Java");
        hashSet.add("C++");
        hashSet.add("Hello");

        String arr[] = { "Hello", "Java" };

        System.out.println(Arrays.toString(hashSet.
                                            toArray(arr)));
    }
}

Output:

[Java, C++, Hello]