Contact Management System

Here is the link program working be like:
👉 https://onlinegdb.com/wDMXT9Imd

This Java console application provides a simple Contact Management System with the following features:

• Add Contact: Add new contact details.
• View Contacts: Display all stored contacts.
• Search Contact: Find a contact by name.
• Update Contact: Modify existing contact details.
• Delete Contact: Remove a contact by name.
• Exit: Exit the application.

It is a simple java program based on concept:

• Java Basic
• Object Oriented Programming
• Encapsulation
• Constructor
• TreeMap

// TreeMap for storing 
 private TreeMap<String, Contact> contactMap = new TreeMap<>(); 

// Traversing in map
for (Map.Entry<String, Contact> entry : contactMap.entrySet()) {
    System.out.println(entry.getValue());
   }