HashSet.md

HashSet

1. Create a HashSet and add some elements to it. Then, print the elements of the HashSet.
2. Write a program to check if a particular element exists in a HashSet.
3. Create a HashMap to store the mappings of country names to their capitals.
4. Write a program to find the common elements between two ArrayLists.
5. Create a TreeMap to store the mappings of words to their frequencies in a given text.
6. Write a program to check if a HashSet is a subset of another HashSet.

Code Snippets

Problem 1

import java.util.HashSet;

public class Main {
    public static void main(String[] args) {
        HashSet<String> set = new HashSet<>();
        set.add("apple");
        set.add("banana");
        set.add("orange");

        System.out.println("HashSet elements: " + set);
    }
}

#Problem 2

#Problem 3

#Problem 4

#Problem 5

#Problem 6