Chapter 17.2, Problem 17.7CP

Explanation of Solution

Instance creation without providing type argument:

“Yes”, the instances of generic class can be created without providing type argument.

Explanation:

• Instance creation of a generic class is possible without providing the type argument.

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...

Explanation of Solution

Recommendation:

“No”, it is not recommended, even the instance of a generic class can be created without providing the type argument.

Explanation:

• Instance creation of a generic class is possible without providing the type argument.

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...