HashSet toArray() method in Java with Example
The toArray() method of Java HashSet is used to form an array of the same elements as that of the HashSet. Basically, it copies all the element from a HashSet to a new array.
Syntax:
Object[] arr = HashSet.toArray()
Parameters: The method does not take any parameters.
Return Value: The method returns an array containing the elements similar to the HashSet.
Below programs illustrate the HashSet.toArray() method:
Program 1:
import java.util.*;
public class HashSetDemo {
public static void main(String args[])
{
HashSet<String>
abs_col = new HashSet<String>();
abs_col.add( "Welcome" );
abs_col.add( "To" );
abs_col.add( "Geeks" );
abs_col.add( "For" );
abs_col.add( "Geeks" );
System.out.println( "The HashSet: "
+ abs_col);
Object[] arr = abs_col.toArray();
System.out.println( "The array is:" );
for ( int j = 0 ; j < arr.length; j++)
System.out.println(arr[j]);
}
}
|
Output:
The HashSet: [Geeks, For, Welcome, To]
The array is:
Geeks
For
Welcome
To
Program 2:
import java.util.*;
public class HashSetDemo {
public static void main(String args[])
{
HashSet<Integer>
abs_col = new HashSet<Integer>();
abs_col.add( 10 );
abs_col.add( 15 );
abs_col.add( 30 );
abs_col.add( 20 );
abs_col.add( 5 );
abs_col.add( 25 );
System.out.println( "The HashSet: "
+ abs_col);
Object[] arr = abs_col.toArray();
System.out.println( "The array is:" );
for ( int j = 0 ; j < arr.length; j++)
System.out.println(arr[j]);
}
}
|
Output:
The HashSet: [20, 5, 25, 10, 30, 15]
The array is:
20
5
25
10
30
15
Last Updated :
24 Dec, 2018
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