The toArray() method of Java SortedSet is used to form an array of the same elements as that of the SortedSet. Basically, it copies all the element from a SortedSet to a new array.
Syntax:
Object[] toArray()
Parameters: The method does not take any parameters.
Return Value: The method returns an array containing the elements similar to the SortedSet.
Note: The toArray() method in SortedSet is inherited from the Set interface in Java.
Below programs illustrate the SortedSet.toArray() method:
Program 1:
// Java code to illustrate toArray() import java.util.*;
public class SortedSetDemo {
public static void main(String args[])
{
// Creating an empty SortedSet
SortedSet<String> abs_col
= new TreeSet<String>();
// Use add() method to add
// elements into the SortedSet
abs_col.add( "Welcome" );
abs_col.add( "To" );
abs_col.add( "Geeks" );
abs_col.add( "For" );
abs_col.add( "Geeks" );
// Displaying the Set
System.out.println( "The SortedSet: "
+ 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]);
}
} |
The SortedSet: [For, Geeks, To, Welcome] The array is: For Geeks To Welcome
Program 2:
// Java code to illustrate toArray() import java.util.*;
public class SetDemo {
public static void main(String args[])
{
// Creating an empty SortedSet
SortedSet<Integer> abs_col
= new TreeSet<Integer>();
// Use add() method to add
// elements into the SortedSet
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 SortedSet
System.out.println( "The SortedSet: "
+ 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]);
}
} |
The SortedSet: [5, 10, 15, 20, 25, 30] The array is: 5 10 15 20 25 30
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Set.html#toArray()