Java

OOP GUIDE / WORK

HAND CLASS SOLUTIONS

TASK – PART 1 – SETUP – CARD CLASS

No solution required.

TASK – PART 2 – HAND CLASS

I have added some functionality to the Card class. Here is my solution for the Card class and the Hand class as well as the Tester class:

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;

}

public boolean isRed()

{

if (suit.equals("Hearts") || suit.equals("Diamonds"))

{

return true;

}

else

{

return false;

}

}

public boolean isBlack()

{

if (suit.equals("Hearts") || suit.equals("Diamonds"))

{

return false;

}

else

{

return true;

}

}

}

public class Hand

{

//INSTANCE VARIABLES (OBJECTS)

public Card c1;

public Card c2;

public Card c3;

public Card c4;

public Card c5;

//CONSTRUCTORS

public Hand(Card tc1, Card tc2, Card tc3, Card tc4, Card tc5)

{

c1 = tc1;

c2 = tc2;

c3 = tc3;

c4 = tc4;

c5 = tc5;

}

public Hand()

{

c1 = new Card();

c2 = new Card();

c3 = new Card();

c4 = new Card();

c5 = new Card();

}

//INSTANCE METHODS

public Card getC1()

{

return c1;

}

public Card getC2()

{

return c2;

}

public Card getC3()

{

return c3;

}

public Card getC4()

{

return c4;

}

public Card getC5()

{

return c5;

}

public boolean isAllRed()

{

if(c1.isRed() && c2.isRed() && c3.isRed() && c4.isRed() && c5.isRed())

{

return true;

}

else

{

return false;

}

}

public boolean isAllBlack()

{

if(c1.isBlack() && c2.isBlack() && c3.isBlack() && c4.isBlack() && c5.isBlack())

{

return true;

}

else

{

return false;

}

}

public boolean containsPair()

{

if (c1.value == c2.value || c1.value == c3.value || c1.value == c4.value || c1.value == c5.value ||

c2.value == c3.value || c2.value == c4.value || c2.value == c5.value ||

c3.value == c4.value || c3.value == c5.value ||

c4.value == c5.value)

{

return true;

}

else

{

return false;

}

}

public String toString()

{

return c1 + ", " + c2 + ", " + c3 + ", " + c4 + ", " + c5;

//above is calling the toString for each card object

}

}

public class Question02

{

public static void main(String[] args)

{

Hand h1 = new Hand();

System.out.println(h1); //calling toString on h1

System.out.println("Pair? " + h1.containsPair());

Card cardA = new Card("Clubs");

Card cardB = new Card("Clubs");

Card cardC = new Card("Spades");

Card cardD = new Card("Spades");

Card cardE = new Card("Clubs");

Hand h2 = new Hand(cardA, cardB, cardC, cardD, cardE);

System.out.println(h2);

System.out.println("All Red? " + h2.isAllRed());

System.out.println("All Black? " + h2.isAllBlack());

}

}