AbstractCollection size() Method in Java with Examples

The size() method of Java AbstractCollection is used to get the size of the Collection or the number of elements present in the Collection.

Syntax:

AbstractCollection.size()

Parameters: The method does not take any parameter.



Return Value: The method returns the size or the number of elements present in the collection.

Below programs illustrates the use of AbstractCollection.size() method:

Program 1:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code to illustrate size()
  
import java.util.*;
import java.util.AbstractCollection;
  
public class AbstractCollectionDemo {
    public static void main(String args[])
    {
  
        // Creating an empty Collection
        AbstractCollection<String>
            abs = new TreeSet<String>();
  
        // Use add() method to add
        // elements into the Collection
        abs.add("Welcome");
        abs.add("To");
        abs.add("Geeks");
        abs.add("4");
        abs.add("Geeks");
        abs.add("TreeSet");
  
        // Displaying the Collection
        System.out.println("Collection: " + abs);
  
        // Displaying the size of the collection
        System.out.println("The size of the Collection is: "
                           + abs.size());
    }
}

chevron_right


Output:

Collection: [4, Geeks, To, TreeSet, Welcome]
The size of the Collection is: 5

Program 2:

filter_none

edit
close

play_arrow

link
brightness_4
code

// Java code to illustrate size()
  
import java.util.*;
import java.util.AbstractCollection;
  
public class AbstractCollectionDemo {
    public static void main(String args[])
    {
  
        // Creating an empty Collection
        AbstractCollection<String>
            abs = new LinkedList<String>();
  
        // Using add() method to add
        // elements in the Collection
        abs.add("Geeks");
        abs.add("for");
        abs.add("Geeks");
        abs.add("10");
        abs.add("20");
  
        // Displaying the Collectoin
        System.out.println("Collection:" + abs);
  
        // Displaying the size of the Collection
        System.out.println("The size of the Collection is: "
                           + abs.size());
    }
}

chevron_right


Output:

Collection:[Geeks, for, Geeks, 10, 20]
The size of the Collection is: 5


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.