Kotlin Class: Person class with nested ContactInfo class

Kotlin Class: Exercise-15 with Solution

Write a Kotlin program that creates a class 'Person' with a nested class 'ContactInfo' to store the person's contact information.

Sample Solution:

Kotlin Code:

class Person(val name: String) {
    private var contactInfo: ContactInfo? = null

    fun setContactInfo(email: String, phone: String) {
        contactInfo = ContactInfo(email, phone)
    }

    fun displayContactInfo() {
        contactInfo?.let {
            println("Contact Information:")
            println("Email: ${it.email}")
            println("Phone: ${it.phone}")
        }
    }

    inner class ContactInfo(val email: String, val phone: String)
}

fun main() {
    val person = Person("Mitko Leida")
    person.setContactInfo("[email protected]", "01234567")
    person.displayContactInfo()
}

Sample Output:

Contact Information:
Email: [email protected]
Phone: 01234567

Explanation:

In the above exercise -

• First we define a "Person" class with a nested class "ContactInfo". The "Person" class has a name property and a nullable contactInfo property of type ContactInfo.
• The "setContactInfo()" function sets the person's contact information. It takes email and phone as parameters and creates an instance of the nested ContactInfo class to store the information.
• The "displayContactInfo()" function displays the person's contact information. It checks if the contactInfo property is not null and prints the email and phone.
• Inside the "ContactInfo" class, we have email and phone properties that store contact information.
• In the main function, we create an instance of the Person class and set the contact information using the "setContactInfo()" function. We call the "displayContactInfo()" function to print the contact information.

Kotlin Editor:

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