Question

Create a class called Toddler that inherits from a class called Parent. (Note that Parent has already been defined elsewhere, so you should not redefine it here.) Toddler should provide one constructor that takes the toddler’s age as an int argument. It should also call the superclass constructor with the age as the first argument and the String "toddler" as the second argument.

Answer 1

Answer:

The solution code is written in Java:

1. public class Toddler extends Parent {
3.    private int age;
5.    public Toddler(int age){
6.        this.age = age;
7.        super(age, "toddler");
8.    }
9. }

Explanation:

Firstly, we create a class named Toddler. To inherit the class from Parent, we can use the extends keyword (Line 1). We also presume the Parent class has been defined in advanced.

Next, we declare a private scope attribute which is age in Toddler class (Line 3).

Create a constructor that take age as input parameter (Line 5).

Assign the input age to the private attribute age (Line 6).

Next, we use super keyword to call the superclass constructor by passing age and string "toddler" as arguments (Line 7).

Answer 2

Answer:

//Create the Toddler class

//to inherit from the Parent class  by

//using the "extends" keyword

public class Toddler extends Parent{

   //Create an instance variable to hold the toddler's age

   int age;    

   //Create a constructor for the Toddler class

   //to take the toddler's age as argument

   Toddler (int age){

       

       //Initialize the instance variable age

       this.age = age;

       //Call the parent constructor using "super"

       //and pass in the toddler's age and the string "toddler"

       //as arguments

       super(age, "toddler");

   }  // End of constructor

}   //End of class declaration

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Explanation:

The program above has been written in Java and it contains comments explaining every line of the code. Please go through the comments carefully.

The actual lines of code have been written in bold-face to distinguish them from comments.