Java

OOP GUIDE / WORK

CARD CLASS 2 SOLUTIONS

TASK – PART 1 – SETUP

• No solution required
  
  

TASK – PART 2 – ALTERING COMPARETO

Here is my solution:

public class Card implements Comparable

{

public String suit; //hearts, diamonds, spades or clubs

public int value;

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 String toString()

{

return value + " of " + suit;

}

@Override

public int compareTo(Object o)

{

//We will compare this and o

Card other = (Card)o;

//If suits are the same

if (this.suit.equals(other.suit))

{

if (this.value < other.value)

{

return -1;

}

else if (this.value == other.value)

{

return 0;

}

else

{

return 1;

}

}

//If suits are different

//Order of suits: clubs, diamonds, spades and then hearts.

if (this.suit.equals("clubs"))

{

return -1;

}

else if (this.suit.equals("diamonds") && !other.suit.equals("clubs"))

{

return -1;

}

else if (this.suit.equals("spades") && other.suit.equals("hearts"))

{

return -1;

}

else

{

return 1;

}

}

}

TASK – PART3 – TESTING

Below is my solution. Note that the only that was changed here is the array’s size.

import java.util.Arrays;

public class Tester

{

public static void main(String[] args)

{

Card[] hand = new Card[10];

//Creating cards

for (int i=0; i<hand.length; i++)

{

hand[i] = new Card();

}

//Output cards

for (int i=0; i<hand.length; i++)

{

System.out.println(hand[i]);

}

Arrays.sort(hand);

System.out.println("======");

//Output cards

for (int i=0; i<hand.length; i++)

{

System.out.println(hand[i]);

}

}

}