Kotlin Class: Create Customer class and send welcome email

Last update on February 05 2025 05:42:11 (UTC/GMT +8 hours)

Write a Kotlin program that creates a class 'Customer' with properties for name, email, and address. Include a function to send a welcome email to the customer.

Pre-Knowledge (Before You Start!)

Before attempting this exercise, you should be familiar with the following concepts:

• Classes in Kotlin: A class is a blueprint for creating objects with specific attributes and behaviors.
• Primary Constructor: Used to initialize properties such as name, email, and address when an object is created.
• Functions in Classes: Functions define behaviors for the class. Here, a function will simulate sending a welcome email.
• Object Creation: Creating an instance of a class and calling its methods to perform actions.
• Printing Output: Using the println() function to display messages to the console.

Hints (Try Before Looking at the Solution!)

Try to solve the problem using these hints:

• Hint 1: Define a class named Customer with properties for name, email, and address.
• Hint 2: Inside the class, create a function called sendWelcomeEmail() that prints a message simulating an email being sent.
• Hint 3: In the main() function, create an instance of the Customer class with sample data.
• Hint 4: Call the sendWelcomeEmail() function on the object to display the simulated email message.

Sample Solution:

Kotlin Code:

class Customer(
    val name: String,
    val email: String,
    val address: String
) {
    fun sendWelcomeEmail() {
        println("Sending a welcome email to $name at $email...")
        // Write your code here to send the welcome email
        println("Email sent successfully!")
    }
}
fun main() {
    val customer = Customer("Ime Juan", "[email protected]", "100 ABC Street")
    customer.sendWelcomeEmail()
}

Sample Output:

Sending a welcome email to Ime Juan at [email protected]...
Email sent successfully!

Explanation:

In the above exercise -

• First we define a class "Customer" with three properties: name, email, and address, representing the customer's name, email address, and their physical address.
• The class includes a function "sendWelcomeEmail()" that simulates sending a welcome email to the customer. In this example, we simply print a message indicating that the email is being sent and another message to simulate the successful delivery of the email.
• In the "main()" function, we create an instance of the Customer class named customer with sample values for the properties.
• Next, we call the "sendWelcomeEmail()" function on the customer object to simulate sending a welcome email.

Kotlin Editor:

Previous: Create an Animal class and make animal sounds.
Next: MathUtils class with static functions.