Explain how java allows the constraints on a generic type, JAVA Programming

Assignment Help:

Consider the following C++ template class.
#include
using namespace std;

template
class SortedList
{
public:
SortedList()
{size = 0;}
void insert(T item);
friend ostream& operator<<(ostream& out, const SortedList& list)
{return list.put(out);}
private:
ostream& put(ostream& out) const;
T list[length];
int size;
};

template
void SortedList::insert(T item)
{
if (size == length)
throw exception("List Full");
int i = size - 1;
while (i >= 0 && item < list[i])
{
list[i+1] = list[i];
i--;
}
list[i+1] = item;
size++;
}

template
ostream& SortedList::put(ostream& out) const
{
for (int i = 0; i < size; i++)
cout << list[i] << " " ;
cout << endl;
return out;
}

int main()
{
int values[] = {5, 1, 7, 8, 11, 2};
SortedList list;
for (int i = 0; i < 6; i++)
list.insert(values[i]);
cout << list;
return 0;
}
The class SortedList cannot be instantiated for any arbitrary type. For example, consider the following instantiation for a wrapper integer class.

class Int
{
public:
Int(int i) {this->i = i;}
private:
int i;
};

int main()
{
Int values[] = {Int(5), Int(1), Int(7), Int(8), Int(11), Int(2)};
SortedList list;
for (int i = 0; i < 6; i++)
list.insert(values[i]);
cout << list;
return 0;
}
Explain why the second implementation fails. What must be added to that class so this program will compile? Suppose this program were written in Java. Explain how Java allows the constraints on a generic type parameter to be specified and how they would be specified in this case

Java does have one limitation, however. Although wrapper classes can be used to instantiate generic type parameters, primitive types cannot. Explain why.


Related Discussions:- Explain how java allows the constraints on a generic type

Explain the three benefits of access protection, Explain the Three Benefits...

Explain the Three Benefits of Access Protection ? Access protection has three major benefits: 1. It permits you to enforce constraints on an object's state. 2. It gives a si

Explain overriding methods and the solution, Explain Overriding Methods: Th...

Explain Overriding Methods: The Solution The object oriented solution to this problem is to describe a new class, call it SlowCar, that inherits from Car and imposes the additi

Application for minesweeper, This program will help you start doing GUI pro...

This program will help you start doing GUI programming, and is a good example of 2D arrays. Mine Sweeper is a classic game that is played on a 2D grid of cells. At the beginning of

Describe graphics objects, Describe Graphics Objects ? In Java all draw...

Describe Graphics Objects ? In Java all drawing takes place via a Graphics object. This is an example of the class java.awt.Graphics. Initially the Graphics object you use w

What is best algorithm, What is best algorithm? Greedy algorithm is the...

What is best algorithm? Greedy algorithm is the best algorithm as it is n algorithm in which always takes the best immediate, or local solution although searching an answer.

Explain how many ways businesses monitor their employees, Explain how many ...

Explain how many ways businesses monitor their employees? • Systems are available which monitor almost every key stroke that an employee forms on a computer. • Systems are avai

Determine the phase loading- java program development, Determine the phase ...

Determine the phase Loading- Java Program Development In phase 3, the program must first be placed in memory before it can be executed. This is done by the class loader, whic

What is bullseye explain with an example, What is Bullseye explain with an ...

What is Bullseye explain with an example? This is a easy applet that draws a series of filled, concentric circles alternating red and white, instead a bullseye. import java.ap

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd