Polymorphism and Abstract Classes - Absolute Java - page 521

9. The following is a short snippet of code that simulates rolling a 6-sided dice 100 times.
There is an equal chance of rolling any digit from 1 to 6.
public static void printDiceRolls(Random randGenerator)
{

VideoNote

Solution to
Programming
Project 8.9

for ( int i = 0; i < 100; i++)
{

System.out.println(randGenerator.nextInt(6) + 1);

}

}

public static void main(String[] args)
{

Random randGenerator = new Random();
printDiceRolls(randGenerator);

}

Create your own class, LoadedDice , that is derived from Random . The constructor
for LoadedDice needs to only invoke Random 's constructor. Override the public
int nextInt(int num) method so that with a 50% chance, your new method
always returns the largest number possible (i.e., num - 1), and with a 50% chance,
it returns what Random 's nextInt method would return.

Test your class by replacing the main method with the following:
LoadedDice myDice = new LoadedDice();
printDiceRolls(myDice);

You do not need to change the printDiceRolls method even though it takes
a parameter of type Random . Polymorphism tells Java to invoke LoadedDice 's
nextInt() method instead of Random 's nextInt() method.