Not sure how it rates speed wise. I think there is some code on sourceforge, too, but this is something I wrote from scratch a few days ago. (I ave some other code from a few years ago, but I decided to start from scratch for my current analysis efforts.)
<font class="small">Code:</font><hr /><pre> public class PokerHand
{
public static final short STRFLUSH = 8;
public static final short QUADS = 7;
public static final short FULLHOUSE = 6;
public static final short FLUSH = 5;
public static final short STRAIGHT = 4;
public static final short TRIPS = 3;
public static final short TWOPAIR = 2;
public static final short PAIR = 1;
public static final short HIGHCARD = 0;
private static final short[] MASKS = {0, 1, 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096};
//for high card/flush hands. PH 2 3 4 5 6 7 8 9 T J Q K A
private static final short SHIFT = 13;
private static final short TWO_SHIFT = 169;
private static final short THREE_SHIFT = 2197;
private short handType;
private short handRank;
private short[] ranks = new short[14];
private boolean[] clubs = new boolean[14];
private boolean[] diamonds = new boolean[14];
private boolean[] hearts = new boolean[14];
private boolean[] spades = new boolean[14];
private boolean ranked = false;
private short numClubs = 0;
private short numDiamonds = 0;
private short numHearts = 0;
private short numSpades = 0;
/** Creates a new instance of PokerHand */
public PokerHand(int[] cards)
{
addCards(cards);
}
public void addCard(int card)
{
ranked = false;
int rank;
int suit;
rank = card % 13;
suit = card / 13;
ranks[rank]++;
ranks[13] = ranks[0];
switch(suit)
{
case 0:
clubs[rank] = true;
numClubs++;
clubs[13] = clubs[0];
break;
case 1:
diamonds[rank] = true;
numDiamonds++;
diamonds[13] = diamonds[0];
break;
case 2:
hearts[rank] = true;
numHearts++;
hearts[13] = hearts[0];
break;
case 3:
spades[rank] = true;
numSpades++;
spades[13] = spades[0];
break;
default:
System.out.println("Error in PokerHand.addCard: illegal suit");
System.exit(1);
}
}
public void addCards(int[] cards)
{
ranked = false;
int rank;
int suit;
for (int i = 0; i < cards.length; i++)
{
rank = cards[i] % 13;
suit = cards[i] / 13;
ranks[rank]++;
switch(suit)
{
case 0:
clubs[rank] = true;
numClubs++;
break;
case 1:
diamonds[rank] = true;
numDiamonds++;
break;
case 2:
hearts[rank] = true;
numHearts++;
break;
case 3:
spades[rank] = true;
numSpades++;
break;
default:
System.out.println("Error in PokerHand.addCards: illegal suit");
System.exit(1);
}
}
clubs[13] = clubs[0];
diamonds[13] = diamonds[0];
hearts[13] = hearts[0];
spades[13] = spades[0];
ranks[13] = ranks[0];
}
private String rank(int i)
{
switch (i)
{
case 13:
case 0: return "A";
case 12: return "K";
case 11: return "Q";
case 10: return "J";
case 9: return "T";
case 8: return "9";
case 7: return "8";
case 6: return "7";
case 5: return "6";
case 4: return "5";
case 3: return "4";
case 2: return "3";
case 1: return "2";
}
return "Illegal Card Rank " + i;
}
public String printHand()
{
String ret = "";
for (int i = 13; i > 0; i --)
{
if (clubs[i]) ret += rank(i) + "c ";
if (diamonds[i]) ret += rank(i) + "d ";
if (hearts[i]) ret += rank(i) + "h ";
if (spades[i]) ret += rank(i) + "s ";
}
return ret;
}
public String printDetailHand()
{
String ret = printHand() + "\tHand Type: ";
switch (handType)
{
case 8: ret += "Str Flush \t"; break;
case 7: ret += "Quads \t"; break;
case 6: ret += "Full House\t"; break;
case 5: ret += "Flush \t"; break;
case 4: ret += "Straight \t"; break;
case 3: ret += "Trips \t"; break;
case 2: ret += "Two Pair \t"; break;
case 1: ret += "One Pair \t"; break;
case 0: ret += "High Card \t"; break;
}
ret += "Rank: " + handRank;
return ret;
}
public void rank()
{
if (ranked) return;
ranked = true;
boolean flushPos = false;
if (numClubs > 4 || numDiamonds > 4 || numHearts > 4 || numSpades > 4) flushPos = true;
int count = 0;
//check for straight flush
if (flushPos)
{
if (numClubs > 4)
{
for (short i = 13; i >= 0; i--)
{
if(clubs[i]) count++;
else count = 0;
if (count == 5)
{
handType = STRFLUSH;
handRank = i;
return;
}
}
}
if (numDiamonds > 4)
{
for (short i = 13; i >= 0; i--)
{
if(diamonds[i]) count++;
else count = 0;
if (count == 5)
{
handType = STRFLUSH;
handRank = i;
return;
}
}
}
if (numHearts > 4)
{
for (short i = 13; i >= 0; i--)
{
if(hearts[i]) count++;
else count = 0;
if (count == 5)
{
handType = STRFLUSH;
handRank = i;
return;
}
}
}
if (numSpades > 4)
{
for (short i = 13; i >= 0; i--)
{
if(spades[i]) count++;
else count = 0;
if (count == 5)
{
handType = STRFLUSH;
handRank = i;
return;
}
}
}
}
//check for quads
short bestQuads = 0;
short bestKicker = 0;
for (short i = 13; i > 0; i--)
{
if (ranks[i] == 4 && bestQuads == 0) bestQuads = i;
else if (ranks[i] > 0 && bestKicker == 0) bestKicker = i;
}
if (bestQuads > 0)
{
handType = QUADS;
handRank = (short) ((bestQuads * SHIFT) + bestKicker);
return;
}
//check for full house
short bestTrips = 0;
short pair = 0;
for (short i = 13; i > 0; i--)
{
if (ranks[i] == 3 && bestTrips == 0) bestTrips = i;
else if ( ranks[i] > 1 && pair == 0) pair = i;
}
if (bestTrips > 0 && pair > 0)
{
handType = FULLHOUSE;
handRank = (short) ((bestTrips * SHIFT) + pair);
return;
}
//check for flush
if (flushPos)
{
count = 0;
handRank = 0;
handType = FLUSH;
if (numClubs > 4)
{
for (short i = 13; i > 0 && count < 5; i--)
{
if (clubs[i])
{
count++;
handRank += MASKS[i];
}
}
return;
}
if (numDiamonds > 4)
{
for (short i = 13; i > 0 && count < 5; i--)
{
if (diamonds[i])
{
count++;
handRank += MASKS[i];
}
}
return;
}
if (numHearts > 4)
{
for (short i = 13; i > 0 && count < 5; i--)
{
if (hearts[i])
{
count++;
handRank += MASKS[i];
}
}
return;
}
if (numSpades > 4)
{
for (short i = 13; i > 0 && count < 5; i--)
{
if (spades[i])
{
count++;
handRank += MASKS[i];
}
}
return;
}
}
//check for straight
for (short i = 13; i >= 0; i--)
{
if (ranks[i] > 0) count++;
else count = 0;
if (count == 5)
{
handRank = i;
handType = STRAIGHT;
return;
}
}
//check for trips
bestTrips = 0;
for (short i = 13; i > 0; i--)
{
if (ranks[i] == 3)
{
bestTrips = i;
break;
}
}
if (bestTrips > 0)
{
count = 0;
handType = TRIPS;
handRank = (short) (bestTrips * TWO_SHIFT);
for (short i = 13; i > 0 && count < 2; i--)
{
if (ranks[i] > 0 && i != bestTrips)
{
count++;
if (count == 1) handRank += (short) (i * SHIFT);
else handRank += i;
}
}
return;
}
//check for two pair
short topPair = 0;
short botPair = 0;
short kicker = 0;
for (short i = 13; i > 0; i--)
{
if (ranks[i] == 2 && topPair == 0) topPair = i;
else if (ranks[i] == 2 && botPair == 0) botPair = i;
else if (ranks[i] > 0 && kicker == 0) kicker = i;
}
if (botPair > 0)
{
handType = TWOPAIR;
handRank = (short) ((topPair*TWO_SHIFT) + (botPair*SHIFT) + kicker);
return;
}
//check for one pair
if (topPair > 0)
{
handType = PAIR;
handRank = (short) (topPair * THREE_SHIFT);
count = 0;
for (short i = 13; i > 0; i --)
{
if (i == topPair) continue;
if (ranks[i] == 1)
{
count ++;
if (count == 1) handRank += (short) (i * TWO_SHIFT);
else if (count == 2) handRank += (short) (i * SHIFT);
else
{
handRank += i;
return;
}
}
}
}
//it's a high card
handType = HIGHCARD;
handRank = 0;
count = 0;
for (short i = 13; i > 0 && count < 5; i--)
{
if (ranks[i] == 1)
{
count++;
handRank += MASKS[i];
}
}
}
public int compare(PokerHand ph)
{
//if we are higher than ph, return 1, tied return 0, losing return -1
if (!ranked) rank();
if (handType > ph.getHandType()) return 1;
else if (ph.getHandType() > handType) return -1;
else if (handRank > ph.getHandRank()) return 1;
else if (ph.getHandRank() > handRank) return -1;
else return 0;
}
public short getHandType()
{
rank();
return handType;
}
public short getHandRank()
{
rank();
return handRank;
}
} </pre><hr />
