AbstractSet isEmpty() method in Java with Example

The isEmpty() method of AbstractSet in Java is used to check whether this AbstractSet is empty or not. It returns an boolean value stating the same.

Syntax:

public boolean isEmpty()

Parameters: This function has no parameters.



Returns: The method returns an boolean value which states that this instance of the AbstractSet is empty or not.

Below examples illustrates the AbstractSet.isEmpty() method:

Example 1:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code to demonstrate the working of
// isEmpty() method in AbstractSet
  
import java.util.*;
  
public class GFG {
    public static void main(String[] args)
    {
        // creating an AbstractSet
        AbstractSet<Integer> arr
            = new TreeSet<Integer>();
  
        // using add() to initialize values
        // [1, 2, 3, 4]
        arr.add(1);
        arr.add(2);
        arr.add(3);
        arr.add(4);
  
        // print AbstractSet
        System.out.println("AbstractSet: "
                           + arr);
  
        // Check if AbstractSet is empty
        // using isEmpty() value
        System.out.println("Is AbstractSet empty? "
                           + arr.isEmpty());
    }
}

chevron_right


Output:

AbstractSet: [1, 2, 3, 4]
Is AbstractSet empty? false

Example 2:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code to demonstrate the working of
// isEmpty() method in AbstractSet
  
import java.util.*;
  
public class GFG {
    public static void main(String[] args)
    {
        // creating an AbstractSet
        AbstractSet<String> arr
            = new TreeSet<String>();
  
        // print AbstractSet
        System.out.println("AbstractSet: "
                           + arr);
  
        // Check if AbstractSet is empty
        // using isEmpty() value
        System.out.println("Is AbstractSet empty? "
                           + arr.isEmpty());
    }
}

chevron_right


Output:

AbstractSet: []
Is AbstractSet empty? true


My Personal Notes arrow_drop_up

Check out this Author's contributed articles.

If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please Improve this article if you find anything incorrect by clicking on the "Improve Article" button below.