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Java
OOP GUIDE / WORK
CARD CLASS SOLUTIONS
TASK –
PART 1 – TESTING THE FOLLOWING CARD CLASS
Here are the
statements that I placed in the main method of the Tester class in order to
test the Card class:
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public class
Tester
{
public static void
main(String[] args)
{
Card c1 = new Card();
System.out.println(c1);
Card c2 = new Card();
System.out.println(c2);
}
}
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Here is some
sample output I got:
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10
of diamonds
12 of hearts
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TASK –
PART 2 – CARD ARRAY
Here is my
Tester class with the Card array:
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public class
Tester
{
public static void
main(String[] args)
{
Card[] hand = new
Card[6];
//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); //this gives error for now
}
}
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Here is some
sample output:
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8 of
hearts
3 of
diamonds
5 of
hearts
10
of spades
3 of
spades
1 of hearts
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TASK –
PART 3 – IMPLEMENTING COMPARABLE
Here
is my Card class that is implementing Comparable (with all previous code in
light gray):
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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
obj)
{
Card other =
(Card)obj;
if (value == other.value)
{
return 0; //same
}
else if (value
< other.value)
{
return -1;
}
else //if
(value > other.value)
{
return 1;
}
}
}
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TASK –
PART 4 – SORTING THE ARRAY
Here
is my solution:
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import java.util.Arrays;
public class
Tester
{
public static void
main(String[] args)
{
Card[] hand = new
Card[6];
//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]);
}
}
}
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Below
is some sample output. The first six
lines are the unsorted array. The next
six lines are the sorted array.
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3 of
spades
2 of
hearts
2 of
clubs
10
of spades
5 of
clubs
8 of
spades
======
2 of
hearts
2 of
clubs
3 of
spades
5 of
clubs
8 of
spades
10 of spades
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