The toArray() method of Java AbstractSet is used to form an array of the same elements as that of the AbstractSet. Basically, it copies all the element from a AbstractSet to a new array.
Syntax:
Object[] arr = AbstractSet.toArray()
Parameters: The method does not take any parameters.
Return Value: The method returns an array containing the elements similar to the AbstractSet.
Below programs illustrate the AbstractSet.toArray() method:
Program 1:
// Java code to illustrate toArray() import java.util.*;
public class AbstractSetDemo {
public static void main(String args[])
{
// Creating an empty AbstractSet
AbstractSet<String>
abs_col = new TreeSet<String>();
// Use add() method to add
// elements into the AbstractSet
abs_col.add( "Welcome" );
abs_col.add( "To" );
abs_col.add( "Geeks" );
abs_col.add( "For" );
abs_col.add( "Geeks" );
// Displaying the AbstractSet
System.out.println( "The AbstractSet: "
+ abs_col);
// Creating the array and using toArray()
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 AbstractSet: [For, Geeks, To, Welcome] The array is: For Geeks To Welcome
Program 2:
// Java code to illustrate toArray() import java.util.*;
public class AbstractSetDemo {
public static void main(String args[])
{
// Creating an empty AbstractSet
AbstractSet<Integer>
abs_col = new TreeSet<Integer>();
// Use add() method to add
// elements into the AbstractSet
abs_col.add( 10 );
abs_col.add( 15 );
abs_col.add( 30 );
abs_col.add( 20 );
abs_col.add( 5 );
abs_col.add( 25 );
// Displaying the AbstractSet
System.out.println( "The AbstractSet: "
+ abs_col);
// Creating the array and using toArray()
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 AbstractSet: [5, 10, 15, 20, 25, 30] The array is: 5 10 15 20 25 30