Chapter 18.2, Problem 18.6CP

Explanation of Solution

Passing reference type to type parameter of a class:

“Yes”, only reference type can be passed to the type parameter of a class.

Explanation:

• Reference type can be passed to the type parameter when creating the instances of a class.
• By default, Java provides Object as type argument on creating the instance of a generic class.

Example:

// Create generic class exam with type parameter T

public class exam<T>

{   

    //Declare the variable with type parameter T

    private T to;

    private T ra;

    //Define the generic class constructor

    public exam(T tot, T rank)

    {   

           //Assigning values for variable

        to= tot;

        ra=rank;

    }

    //Define the main method

    public static void main (String[] args)

    {

        //Create the Integer object

        Integer rank= new Integer(2);

        //Create Double object

        Double tot= new Double(466...