You are designing a Java class Smartphone that must always have a brand and model specified when an object is created. Which constructor approach is best?
hard📝 Application Q8 of 15
Java - Constructors
You are designing a Java class Smartphone that must always have a brand and model specified when an object is created. Which constructor approach is best?
AAvoid constructors and initialize brand and model directly in the class
BUse only a default constructor that sets brand and model to empty strings
CCreate multiple constructors with no parameters and set brand/model later via methods
DDefine a constructor with parameters for brand and model, and no default constructor
Step-by-Step Solution
Solution:
Step 1: Understand requirement
The class must ensure brand and model are always set when creating an object.
Step 2: Evaluate constructor options
A parameterized constructor enforces setting these values at creation time.
Step 3: Why other options fail
Default constructors or setting values later can lead to uninitialized or invalid objects.
Final Answer:
Define a constructor with parameters for brand and model, and no default constructor -> Option D
