Question

need help with code it won't compile.

import java.util.ArrayList;
/**
* Counts the ranks of cards in a hand.
*
* @author (your name)
* @version (a version number or a date)
*/
public class CountRank
{
// instance variables - replace the example below with your own
private int rankCount[];
private Hand hand;
private int count;

/**
* Constructor for objects of class CountRank
*/
public CountRank(Hand h)
{
// initialise instance variables
hand = h;
rankCount = new int[15];
count = 15;
for(int i=0;i<15;i++)
{
rankCount[i] = 0;
}
for(Card card: h.cards)
{
rankCount[card.getRank()] += 1;
}
}
  
/**
* Returns true if any rank count is 4.
*/
public boolean fourOfAKind()
{
//
for(int i=2;i<count;i++)
{
if(rankCount[i] ==4)
{
return true;
}
}
return false;
}
  
private int countPairs()
{
int p = 0;
for(int i=2;i<count;i++)
{
if(rankCount[i] ==2)
{
p++;
}
}
return p;
}
  
public boolean onePair()
{
if(countPairs() == 1)
{
return true;
}
return false;
}
  
public boolean noPair()
{
return true;
}
  
public boolean twoPair()
{
if(countPairs() == 2)
{
return true;
}
return false;
}
  
public boolean threeOfAKind()
{
for(int i=2;i<count;i++)
{
if(rankCount[i] == 3)
{
return true;
}
}
return false;
}
  
//Returns true if consecutive rank counts of 1, at indexes min thru max, inclusive.
public boolean Straight(int min, int max)
{
for(int i=min;i<=max;i++)
{
if(rankCount[i] != 1)
{
return false;
}
}
return true;
}
  

public boolean FullHouse()
{
boolean isOnePair = onePair();
boolean isThreeOfAKind = threeOfAKind();
  
if(isOnePair == true && isThreeOfAKind == true)
{
return true;
}
return false;
}   
}
import java.util.ArrayList;
/**
* A hand must be validated during creation, to check that it does not contain duplicate cards.
*
* @author (your name)
* @version (a version number or a date)
*/
public class Hand
{
// instance variables
private ArrayList<Card> cards;
  
public static final int SUITS = 4;
public static final int RANKs = 15;
  
public static final int NO_PAIR = 0;
public static final int ONE_PAIR = 1;
public static final int TWO_PAIR = 2;
public static final int THREE_OF_A_KIND = 3;
public static final int STRAIGHT = 4;
public static final int FLUSH = 5;
public static final int FULL_HOUSE = 6;
public static final int FOUR_OF_A_KIND = 7;
public static final int STRAIGHT_FLUSH = 8;
public static final int ROYAL_FLUSH = 9;

/**
* Constructor for objects of class Hand
*/
public Hand()
{
// initialise instance variables
cards = new ArrayList<Card>(5);
}

/**
* Create a full hand object from the 5 card objects.
*
*/
public Hand(Card first, Card second, Card third, Card fourth, Card fifth)
{
// put your code here
cards.add(first);
cards.add(second);
cards.add(third);
cards.add(fourth);
cards.add(fifth);
// cards[0] = first;
// cards[1] = second;
// cards[2] = third;
// cards[3] = fourth;
// cards[4] = fifth;
}
// return the card at index i from a hand.
public Card getCard(int i)
{
return cards.get(i);
}
  
public void addCard(Card card)
{
if (cards.size() != 5)
cards.add(card);
}
  
//return the category of a hand.
public int category()
{
int category = NO_PAIR;

if (royalFlush())
{
category = ROYAL_FLUSH;
}
else if (straightFlush())
{
category = STRAIGHT_FLUSH;
}
else if (fourOfAKind())
{
category = FOUR_OF_A_KIND;
}
else if (fullHouse())
{
category = FULL_HOUSE;
}
else if (Flush())
{
category = FLUSH;
}
else if (straight())
{
category = STRAIGHT;
}
else if (threeOfAKind())
{
category = THREE_OF_A_KIND;
}
else if ( twoPair())
{
category = TWO_PAIR;
}
else if (onePair());
{
category = ONE_PAIR;
}
  
return category;
}
// return true if this hand is a royal flush.
public boolean royalFlush()
{
boolean isFlush = Flush();
if(isFlush == false)
{
return isFlush;
}
  
if(Straight(10,14) == true)
{
return true;
}
return false;
  
}
  
public boolean Flush()
{
if(hand.getCard(0).getSuit() == hand.getCard(1).getSuit())
{
if(hand.getCard(0).getSuit() == hand.getCard(2).getSuit())
{
if(hand.getCard(0).getSuit() == hand.getCard(3).getSuit())
{
if(hand.getCard(0).getSuit() == hand.getCard(4).getSuit())
{
return true;
}
}
}
}
return false;
}
  
public boolean straightFlush()
{
int suit = hand.cards[0].getSuit();
  
for(Card c : hand.cards)
{
if(c.getSuit() != suit)
{
return false;
}
}
  
for(int i=2;i<10;i++)
{
if(Straight(i,i+4) == true)
{
return true;
}
}
return false;
}
//return true if this hand has exactly one pair.
/**
* Return true if this hand has exactly one of this 6 methods from CountRank class.
*/
public boolean onePair()
{
CountRank cr = new CountRank(this);
// check cr for exactly one pair
return cr.onePair();
}
  
public boolean twoPair()
{
CountRank cr = new CountRank(this);
return cr.twoPair();
}
  
public boolean threeOfAKind()
{
CountRank cr = new CountRank(this);
return cr.threeOfAKind();
}
  
public boolean straight()
{
CountRank cr = new CountRank(this);
return cr.Straight(10,14);
}
  
public boolean fullHouse()
{
CountRank cr = new CountRank(this);
return cr.FullHouse();
}
  
public boolean fourOfAKind()
{
CountRank cr = new CountRank(this);
return cr.fourOfAKind();
}
//return true if hand contains at least one Ace.
/**
* Return true if hand contains at least one Ace.
*/
private boolean hasAce()
{
return true;
  
}
//return true if the rank is in the hand.
//private boolean findrank(int rank)
//{
  
  
//}
/**
* Return a card to the hand.
*
* @return
*/
public String toString()
{
return cards.toString();
}
}   

Answer 1

Errors in Hand.java:

===============

There is class named Card was used in the code which is not present in the above code. Please make sure that you have in your code and imported properly.

Inside the method Flush(), you are using a reference variable call hand, which is not declared and initialized. Please make sure you initialize it properly.

Straight method should be changed as below:

public boolean Straight(int num1, int num2)
{
    CountRank cr = new CountRank(this);
    return cr.Straight(num1, num2);
}

ArrayList of Cards should be like this:

ArrayList<Card> cards;

Errors in CountRank,java:

There is only one error that is Card class is not recognized here. Please make sure you have Card.java in your code.