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