Java

OOP GUIDE / WORK

HAND CLASS

Topics

• Aggregation (with no encapsulation)

TASK – PART 1 – SETUP – CARD CLASS

Start by copying this Card class to your IDE.

public class Card

{

public int value;

public String suit;

public Card(int tvalue, String tsuit)

     {

value = tvalue;

suit = tsuit;

     }

public Card()

     {

value = (int)(Math.random() * 13 + 1);

double rn = Math.random();

if (rn <= 0.25)

           {

suit = "Hearts";

           }

else if (rn <= 0.50)

           {

suit = "Diamonds";

           }

else if (rn <= 0.75)

           {

suit = "Spades";

           }

else

           {

suit = "Clubs";

           }

     }

public Card(String tsuit)

     {

suit = tsuit;

value = (int)(Math.random() * 13 + 1);

     }

public String toString()

{

return value + " of " + suit;

}

}

TASK – PART 2 – HAND CLASS

Create a Hand class that has the following:

• It has five Card instance variables.  They are named c1, c2, c3, c4 and c5.
• It has a constructor that gets five Card objects as arguments and passes them to the data fields.
• It has a constructor that has no arguments and creates five Cards randomly (see constructors in the Card class) for the data fields.
• It has a get method of each card.
• It has a method named allRed() that returns true only if every card is either a heart or a diamond.
• It has a method named allBlack() that returns true only if every card is either a spade or a club.
• It has a method named containsPair() that returns true if there is at least a pair in the hand.
• It has a toString() method that returns a String representation of the Hand object.

Test your method by creating a Hand object and trying your methods.