AbstractSet size() method in Java with Example

The size() method of AbstractSet in Java is used to get the size for this instance of the AbstractSet. It returns an integer value which is the size for this instance of the AbstractSet.

Syntax:

public int size()

Parameters: This function has no parameters.

Returns: The method returns an integer value which is the size for this instance of the AbstractSet.

Below examples illustrates the AbstractSet.size() method:

Example 1:

// Java code to demonstrate the working of
// size() 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);

        // Get the size
        // using size()
        System.out.println("Size: "
                           + arr.size());
    }
}

Output:

AbstractSet: [1, 2, 3, 4]
Size: 4

Example 2:

// Java code to demonstrate the working of
// size() method in AbstractSet

import java.util.*;

public class GFG {
    public static void main(String[] args)
    {
        // creating an AbstractSet
        AbstractSet<String> arr
            = new TreeSet<String>();

        // using add() to initialize values
        // [Geeks, For, ForGeeks, GeeksForGeeks]
        arr.add("Geeks");
        arr.add("For");
        arr.add("ForGeeks");
        arr.add("GeeksForGeeks");

        // print AbstractSet
        System.out.println("AbstractSet: "
                           + arr);

        // Get the size
        // using size()
        System.out.println("Size: "
                           + arr.size());
    }
}

Output:

AbstractSet: [For, ForGeeks, Geeks, GeeksForGeeks]
Size: 4