Unique Hashtags Counter

Question

I was looking at this code and I was wondering what's the best way to change the output to state the number of hashtags instead of what the hashtags are? Like if you input #one #two blue red #one #green four #jaja hg instead of getting a output of [#one, #two, #jaja, #green] you would get a output of [4]

import java.util.HashSet;
import java.util.Scanner;
import java.util.Set;

public class HashTags {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("Please enter a line of text");
        String tweet = scanner.nextLine();
        Set<String> hashtags = getHashtags(tweet);      
        System.out.println(hashtags.toString());
    }

    public static Set<String> getHashtags(String tweet) {
        String[] words = tweet.split(" ");
        Set<String> hashtags = new HashSet<String>();
        for (String word : words) {
            if (word.startsWith("#")) {
                hashtags.add(word);
            }
        }
        return hashtags;
    }
}

Answer 1

Use Set#size()

System.out.println(hashtags.size());