PhoneDirectory is a Java application that simulates a phone directory, allowing users to store and manage contact information. It utilizes various data structures to efficiently store and retrieve data, including HashMap, Binary Search Tree (BST), and LinkedList.

• Add a new contact with name and phone number.
• Search for a contact by name or phone number.
• Update contact details such as name or phone number.
• Delete a contact from the directory.
• Display all contacts in alphabetical order or by phone number.
• Import and export contacts to/from a file for data persistence.

The PhoneDirectory application utilizes the following data structures:

• HashMap: Used for fast lookup of contacts by name, ensuring constant-time complexity for retrieval and storage.
• Binary Search Tree (BST): Used to maintain contacts in sorted order by phone number, enabling efficient searching and retrieval operations.
• LinkedList: Used for storing contacts in the order they were added, facilitating insertion and deletion of contacts.

To run the PhoneDirectory application on your local machine, follow these steps:

1. Clone the repository:

git clone https://github.com/SajidBhatti786/PhoneDirectory.git

2. Open the project in your preferred Java IDE.

3. Build and run the application.

1. Add a Contact: Use the "Add" functionality to enter the name and phone number of a new contact.
2. Search for a Contact: Use the "Search" functionality to find a contact by name or phone number.
3. Update a Contact: Use the "Update" functionality to modify the name or phone number of an existing contact.
4. Delete a Contact: Use the "Delete" functionality to remove a contact from the directory.
5. Display Contacts: Use the "Display" functionality to show all contacts in alphabetical order or by phone number.
6. Import/Export Contacts: Use the "Import" and "Export" options to load contacts from a file or save contacts to a file for data persistence.

Contributions to the PhoneDirectory project are welcome. If you have any suggestions, improvements, or bug fixes, please submit a pull request or open an issue in the GitHub repository.

• PhoneDirectory
• Java application
• Phone directory
• Contact management
• Contact information
• HashMap
• Binary Search Tree (BST)
• LinkedList
• Add contact
• Search contact
• Update contact
• Delete contact
• Display contacts
• Import contacts
• Export contacts
• Data structures
• Data persistence
• Sorting contacts
• Name lookup
• Phone number lookup
• Fast retrieval
• Constant-time complexity
• Insertion and deletion
• Alphabetical order
• File management
• Getting started
• Local development
• Clone repository
• IDE
• Build and run
• Usage
• Functionality
• Contact details
• Data storage
• Data retrieval
• Data modification
• Display options
• File import
• File export
• Contributing
• Pull requests
• Issue tracking
• License
• MIT License
• Open source project
• Customization
• Bug fixes
• Suggestions
• Improvements
• Data management
• File handling
• Data lookup
• Sorting algorithms
• Collaboration
• Contact organization