Conclusion

In this tutorial, we have explored the concept of hash tables and their applications in computer science and software development. Hash tables provide a fast and efficient way to store and retrieve key-value pairs. They are widely used in various scenarios where quick access to data is required.

Throughout the tutorial, we have covered the following topics:

• Introduction to hash tables
• Implementing a hash table
• Hashing functions
• Inserting, retrieving, updating, and deleting key-value pairs
• Handling collisions
• Performance analysis
• Real-world applications

By understanding these concepts, you now have a solid foundation for using hash tables in your own projects and solving problems efficiently.

If you want to further explore data structures and algorithms, I recommend studying topics like arrays, linked lists, trees, graphs, and sorting algorithms. Additionally, low-level design and high-level design concepts can help you build scalable and efficient software systems.

Keep practicing and applying these concepts in your coding projects. The more you use them, the better you will become at designing and implementing efficient solutions.

Remember, becoming proficient in data structures and algorithms is an ongoing journey. Stay curious, keep learning, and enjoy the process!

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import java.util.HashMap;

​

public class Main {

    public static void main(String[] args) {

        // Create a new hash table

        HashMap<String, Integer> hashTable = new HashMap<>();

​

        // Insert key-value pairs

        hashTable.put("Apple", 10);

        hashTable.put("Orange", 5);

        hashTable.put("Banana", 8);

​

        // Retrieve values

        int numberOfApples = hashTable.get("Apple");

        int numberOfOranges = hashTable.get("Orange");

        int numberOfBananas = hashTable.get("Banana");

​

        // Update values

        hashTable.put("Apple", numberOfApples + 1);

        hashTable.put("Orange", numberOfOranges - 2);

        hashTable.put("Banana", numberOfBananas + 3);

​

        // Delete key-value pairs

        hashTable.remove("Orange");

​

        // Print the final hash table

        System.out.println(hashTable);

    }

}