The toString() method of Java HashSet is used to return a string representation of the elements of the Collection.
The String representation comprises a set representation of the elements of the Collection in the order they are picked by the iterator closed in square brackets[].This method is used mainly to display collections other than String type(for instance: Object, Integer)in a String Representation.
Syntax:
public String toString()
Parameter The method does not take any parameters.
Return This method returns a String representation of the collection.
Below examples illustrate the toString() method:
Example 1:
// Java program to demonstrate // HashSet toString() method import java.util.*;
public class collection {
public static void main(String args[])
{
// Creating an Empty HashSet
HashSet<String> abs
= new HashSet<String>();
// Use add() method
// to add elements to the Collection
abs.add( "Welcome" );
abs.add( "To" );
abs.add( "Geeks" );
abs.add( "For" );
abs.add( "Geeks" );
// Using toString() method
System.out.println(abs.toString());
}
} |
[Geeks, For, Welcome, To]
Example 2:
// Java program to demonstrate // HashSet toString() method import java.util.*;
public class collection {
public static void main(String args[])
{
// Creating an Empty HashSet
HashSet<Integer> abs
= new HashSet<Integer>();
// Use add() method
// to add elements to the Collection
abs.add( 10 );
abs.add( 20 );
abs.add( 30 );
abs.add( 40 );
// Using toString() method
System.out.println(abs.toString());
}
} |
[20, 40, 10, 30]