Open In App
Related Articles

AbstractCollection size() Method in Java with Examples

Improve
Improve
Improve
Like Article
Like
Save Article
Save
Report issue
Report

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:
 

Java

// 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());
    }
}

                    

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

 

Program 2:
 

Java

// 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 Collection
        System.out.println("Collection:" + abs);
 
        // Displaying the size of the Collection
        System.out.println("The size of the Collection is: "
                           + abs.size());
    }
}

                    

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

 


Last Updated : 19 May, 2021
Like Article
Save Article
Previous
Next
Share your thoughts in the comments
Similar Reads