CellPhone Service

Create a CellPhone class and build your first object from it

Workbook 2a, p.38-39 — Exercise 1

What You're Building

Create a CellPhone class that represents a cell phone. The class should have five properties: serial number, model, carrier, phone number, and owner. Include a no-argument constructor that sets all fields to default values. Add getter and setter methods for each field. Then in your main class, create one CellPhone object, ask the user for each piece of information, set the values, and display all the phone's details.

Example Run

Run 1

Enter the serial number: 12345 Enter the model: iPhone 15 Enter the carrier: Verizon Enter the phone number: 555-123-4567 Enter the owner's name: Dana Serial Number: 12345 Model: iPhone 15 Carrier: Verizon Phone Number: 555-123-4567 Owner: Dana

Run 2

Enter the serial number: 98765 Enter the model: Galaxy S24 Enter the carrier: T-Mobile Enter the phone number: 855-555-2222 Enter the owner's name: Marcus Serial Number: 98765 Model: Galaxy S24 Carrier: T-Mobile Phone Number: 855-555-2222 Owner: Marcus

Key detail: You need two files for this exercise — one for the CellPhone class and one for the main application that creates and uses the object.

Concepts You'll Use

This exercise reinforces these concepts from Week 2:

Classes & Objects Encapsulation

Flow Diagram

Step 1 Create CellPhone class 5 private fields

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Step 2 Add constructor No-arg with defaults

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Step 3 Add getters & setters For all 5 fields

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Step 4 In main: create object new CellPhone()

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Step 5 Prompt user for info Scanner for all 5 fields

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Step 6 Display phone details All 5 properties

Think about which data type each field should be. Should serial number be a number or a String?