while loop just stops looping

**dstars5** · November 24th, 2013, 10:30 AM

Hey guys,

I am writing a program to play blackjack automatically. I am having trouble though with a while loop. For some reason, it just stops. It should be outputting, so it isn't even like it is stuck in an infinite loop. There are no errors either. My code and an example of the output are below. As far as I can tell, this happens when either it should hit or stay. Can someone help me out?

An example of the output I am getting (Obviously not running the 10 hands that it should)

How many hands would you like to run?
10
What would you like the base bet to be?
1
Current balance is: 1000
Player bets 1. Balance is now 999
0
1
Player has: Jack, 10 for a value of 20. Dealer shows 7
(18,5)
Player stays.
Dealer has 7, 7, 3 for 17
Player beat dealer.
Current balance is: 1001
Player bets 3. Balance is now 998
0
1
Player has: 10, 2 for a value of 12. Dealer shows 5
(0,3)
Player stays.
Dealer has 3, 5, 8, 3 for 19
Dealer beat player.
Current balance is: 998
Player bets 2. Balance is now 996
0
1
Player has: 3, 9 for a value of 12. Dealer shows Jack
(0,8)
Player hits.
2
Player has: 3, 9, 2 for a value of 14. Dealer shows Jack
(2,8)
Player hits.
3

The part that is not working (the while loop is the issue, not the for loop. just added the for loop in case it helps you see what it should do.)

for (int i = 0; i < hands.size(); i++) {
					if (i == 1) 
						continue;
 
					int handIter = 0;
 
					while (true) {
						handIter++;
						System.out.println(handIter);
 
						p("Player has: " + hands.get(i) + " for a value of " + hands.get(i).getValue() + ". Dealer shows " + hands.get(1).getCard(1).getName());
 
						if (hands.get(i).getValue() <= 21) {
							String action = actions.getAction(hands.get(i), hands.get(1));
 
							if (action.equals("HIT")) {
								p("Player hits.");
 
								hands.get(i).addCard(deck.draw());
							} else if (action.equals("STAY")) {
								p("Player stays.");
 
								break;
							} else if (action.equals("DOUBLE") && handIter == 1) {
								p("Player doubles.");
 
								if (bal - origBet >= 0) {
									bal -= origBet;
									bet += origBet;
 
									hands.get(i).addCard(deck.draw());
 
									break;
								} else {
									hands.get(i).addCard(deck.draw());
								}
							} else if (action.equals("SPLIT") && handIter == 1) {
								if (bal - origBet < 0) {
									p("Player is out of money!");
									break game;
								}
 
								p("Player splits.");
 
								hands.add(new Hand());
 
								hands.get(hands.size() - 1).addCard(hands.get(i).removeCard(1));
								hands.get(hands.size() - 1).addCard(deck.draw());
 
								hands.get(i).addCard(deck.draw());
 
								handIter--;
							}
 
						} else {
							p("Player busts.");
							break;
						}
					}
				}

The full code

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
 
 
public class Blackjack {
	private static final int DECKS = 6;
	private static Scanner in = new Scanner(System.in);
 
	private static Actions actions = new Actions();
 
	private static int bal = 1000;
 
	public static void main(String[] args) {
		Deck deck = new Deck(DECKS);
		List<Hand> hands;
 
		boolean playing = true;
 
		while(playing) {
 
			p("How many hands would you like to run?");
			int ans = in.nextInt();
			p("What would you like the base bet to be?");
			int b = in.nextInt();
 
			int[] bets = {(b * 1), (b * 3), (b * 2), (b * 6), (b * 3), (b * 4), (b * 5), (b * 6), (b * 7), (b * 8), (b * 9), (b * 10)};
			int currBetPos = 0;
 
			//Begin automation
 
			game:
			for (int iter = 1; iter <= ans; iter++) {
				deck.shuffle();
				hands = new ArrayList<Hand>();
 
				p("Current balance is: " + bal);
 
				while (bal - bets[currBetPos] < 0) {
					currBetPos--;
 
					if (currBetPos < 0) break game;
				}
 
				int bet = bets[currBetPos++];
				bal -= bet;
 
				p("Player bets " + bet + ".  Balance is now " + bal);
 
				int origBet = bet;
 
				if (currBetPos > bets.length) 
					currBetPos = 0;
 
 
				//Initial Deal
				Hand pHand = new Hand();
				Hand dHand = new Hand();
 
				pHand.addCard(deck.draw());
				dHand.addCard(deck.draw());
				pHand.addCard(deck.draw());
				dHand.addCard(deck.draw());
 
				hands.add(pHand);
				hands.add(dHand);
 
				//Play main player hand
 
				hands:
				for (int i = 0; i < hands.size(); i++) {
					if (i == 1) 
						continue;
 
					int handIter = 0;
 
					while (true) {
						handIter++;
						System.out.println(handIter);
 
						p("Player has: " + hands.get(i) + " for a value of " + hands.get(i).getValue() + ". Dealer shows " + hands.get(1).getCard(1).getName());
 
						if (hands.get(i).getValue() <= 21) {
							String action = actions.getAction(hands.get(i), hands.get(1));
 
							if (action.equals("HIT")) {
								p("Player hits.");
 
								hands.get(i).addCard(deck.draw());
							} else if (action.equals("STAY")) {
								p("Player stays.");
 
								break;
							} else if (action.equals("DOUBLE") && handIter == 1) {
								p("Player doubles.");
 
								if (bal - origBet >= 0) {
									bal -= origBet;
									bet += origBet;
 
									hands.get(i).addCard(deck.draw());
 
									break;
								} else {
									hands.get(i).addCard(deck.draw());
								}
							} else if (action.equals("SPLIT") && handIter == 1) {
								if (bal - origBet < 0) {
									p("Player is out of money!");
									break game;
								}
 
								p("Player splits.");
 
								hands.add(new Hand());
 
								hands.get(hands.size() - 1).addCard(hands.get(i).removeCard(1));
								hands.get(hands.size() - 1).addCard(deck.draw());
 
								hands.get(i).addCard(deck.draw());
 
								handIter--;
							}
 
						} else {
							p("Player busts.");
							break;
						}
					}
				}
 
				//Play dealer hand
 
				while (true) {
					if (hands.get(1).getValue() < 17) {
						hands.get(1).addCard(deck.draw());
					} else {
						break;
					}
				}
 
				p("Dealer has " + hands.get(1).toString() + " for " + hands.get(1).getValue());
 
				//Check outcome
 
				for (int i = 0; i < hands.size(); i++) {
					if (i == 1) continue;
 
					if (hands.get(i).getValue() > 21) {
						p("You bust.");
						continue;
					}
 
					if (hands.get(1).checkBlackjack()) {
 
						if (hands.get(i).checkBlackjack()) {
							bal += origBet;
 
							p("Both had blackjack.  Player pushes.");
						}
 
					} else if (hands.get(i).checkBlackjack()) {
						bal += origBet;
						bal += (origBet * 1.5);
 
						p("Player had blackjack.");
					} else if (hands.get(i).getValue() > hands.get(1).getValue()) {
						bal += (origBet * 2);
						p("Player beat dealer.");
					} else {
						p("Dealer beat player.");
					}
				}
			}
		}
	}
 
	private static void p(String s) {
		System.out.println(s);
	}
 
	private static void p(int s) {
		System.out.println(s);
	}
}

And finally the rest of the classes:
Actions.java

public class Actions {
	private static final String[][] actions = {
		//              2        3          4        5          6        7         8         9         10         Ace
		/* 12      */{"HIT   ", "HIT   ", "STAY  ", "STAY  ", "STAY  ", "HIT   ", "HIT   ", "HIT   ", "HIT   ", "HIT   "}, //Index 0
		/* 13      */{"STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "HIT   ", "HIT   ", "HIT   ", "HIT   ", "HIT   "},
		/* 14      */{"STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "HIT   ", "HIT   ", "HIT   ", "HIT   ", "HIT   "},
		/* 15      */{"STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "HIT   ", "HIT   ", "HIT   ", "HIT   ", "HIT   "},
		/* 16      */{"STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "HIT   ", "HIT   ", "HIT   ", "HIT   ", "HIT   "},
		/* 17      */{"STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  "},
 
		/* 8       */{"HIT   ", "HIT   ", "HIT   ", "HIT   ", "HIT   ", "HIT   ", "HIT   ", "HIT   ", "HIT   ", "HIT   "}, //Index 6
		/* 9       */{"HIT   ", "DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "HIT   ", "HIT   ", "HIT   ", "HIT   ", "HIT   "},
		/* 10      */{"DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "HIT   ", "HIT   "},
		/* 11      */{"DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "HIT   "},
 
		/* 2 - 2   */{"SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "HIT   ", "HIT   ", "HIT   ", "HIT   "}, //Index 10
		/* 3 - 3   */{"SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "HIT   ", "HIT   ", "HIT   ", "HIT   "},
		/* 4 - 4   */{"HIT   ", "HIT   ", "HIT   ", "SPLIT ", "SPLIT ", "HIT   ", "HIT   ", "HIT   ", "HIT   ", "HIT   "},
		/* 5 - 5   */{"DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "HIT   ", "HIT   "},
		/* 6 - 6   */{"SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "HIT   ", "HIT   ", "HIT   ", "HIT   ", "HIT   "},
		/* 7 - 7   */{"SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "HIT   ", "HIT   ", "HIT   ", "HIT   "},
		/* 8 - 8   */{"SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT "},
		/* 9 - 9   */{"SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "STAY  ", "SPLIT ", "SPLIT ", "STAY  ", "STAY  "},
		/* 10 - 10 */{"STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  "},
		/* A - A   */{"SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT ", "SPLIT "},
 
		/* A2 - A3 */{"HIT   ", "HIT   ", "HIT   ", "DOUBLE", "DOUBLE", "HIT   ", "HIT   ", "HIT   ", "HIT   ", "HIT   "}, //Index 20
		/* A4 - A5 */{"HIT   ", "HIT   ", "DOUBLE", "DOUBLE", "DOUBLE", "HIT   ", "HIT   ", "HIT   ", "HIT   ", "HIT   "},
		/* A6      */{"HIT   ", "DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "HIT   ", "HIT   ", "HIT   ", "HIT   ", "HIT   "},
		/* A7      */{"STAY  ", "DOUBLE", "DOUBLE", "DOUBLE", "DOUBLE", "STAY  ", "STAY  ", "HIT   ", "HIT   ", "HIT   "},
		/* A8      */{"STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  "},
		/* A9      */{"STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  ", "STAY  "}
	};
 
	public static String getAction(Hand player, Hand dealer) {
		int playerIndex = 0;
		int dealerIndex = 0;
 
		//Find player index
		switch (player.getValue()) {
			case 12:
				playerIndex = 0;
				break;
			case 13:
				playerIndex = 1;
				break;
			case 14:
				playerIndex = 2;
				break;
			case 15:
				playerIndex = 3;
				break;
			case 16:
				playerIndex = 4;
				break;
			case 17:
				playerIndex = 5;
				break;
			case 8:
				playerIndex = 6;
				break;
			case 9:
				playerIndex = 7;
				break;
			case 10:
				playerIndex = 8;
				break;
			case 11:
				playerIndex = 9;
				break;
		}
 
		if (player.getValue() >= 17 && player.getValue() <=21) {
			playerIndex = 25;
		}
 
		if (player.getHandSize() == 2) {
			int plyrVal = player.getCard(0).getValue();
			int plyrVal1 = player.getCard(1).getValue();
 
			String plyrName = player.getCard(0).getName();
			String plyrName1 = player.getCard(1).getName();
 
			if (plyrVal == 2 && plyrVal1 == 2) {
				playerIndex = 10;
			} else if (plyrVal == 3 && plyrVal1 == 3) {
				playerIndex = 11;
			} else if (plyrVal == 4 && plyrVal1 == 4) {
				playerIndex = 12;
			} else if (plyrVal == 5 && plyrVal1 == 5) {
				playerIndex = 13;
			} else if (plyrVal == 6 && plyrVal1 == 6) {
				playerIndex = 14;
			} else if (plyrVal == 7 && plyrVal1 == 7) {
				playerIndex = 15;
			} else if (plyrVal == 8 && plyrVal1 == 8) {
				playerIndex = 16;
			} else if (plyrVal == 9 && plyrVal1 == 9) {
				playerIndex = 17;
			} else if (plyrVal == 10 && plyrVal1 == 10) {
				playerIndex = 18;
			} else if (plyrName.equals("Ace") && plyrName1.equals("Ace")) {
				playerIndex = 19;
			} else if ((plyrName.equals("Ace") && (plyrVal1 == 2 || plyrVal1 == 3)) || (plyrName1.equals("Ace") && (plyrVal == 2 || plyrVal == 3))) {
				playerIndex = 20;
			} else if ((plyrName.equals("Ace") && (plyrVal1 == 4 || plyrVal1 == 5)) || (plyrName1.equals("Ace") && (plyrVal == 4 || plyrVal == 5))) {
				playerIndex = 21;
			} else if ((plyrName.equals("Ace") && plyrVal1 == 6) || (plyrName1.equals("Ace") && plyrVal == 6)) {
				playerIndex = 22;
			} else if ((plyrName.equals("Ace") && plyrVal1 == 7) || (plyrName1.equals("Ace") && plyrVal == 7)) {
				playerIndex = 23;
			} else if ((plyrName.equals("Ace") && plyrVal1 == 8) || (plyrName1.equals("Ace") && plyrVal == 8)) {
				playerIndex = 24;
			} else if ((plyrName.equals("Ace") && plyrVal1 == 9) || (plyrName1.equals("Ace") && plyrVal == 9)) {
				playerIndex = 25;
			}
 
		}
 
		//Find dealer index
		if (dealer.getCard(1).getValue() == 2) {
			dealerIndex = 0;
		} else if (dealer.getCard(1).getValue() == 3) {
			dealerIndex = 1;
		} else if (dealer.getCard(1).getValue() == 4) {
			dealerIndex = 2;
		} else if (dealer.getCard(1).getValue() == 5) {
			dealerIndex = 3;
		} else if (dealer.getCard(1).getValue() == 6) {
			dealerIndex = 4;
		} else if (dealer.getCard(1).getValue() == 7) {
			dealerIndex = 5;
		} else if (dealer.getCard(1).getValue() == 8) {
			dealerIndex = 6;
		} else if (dealer.getCard(1).getValue() == 9) {
			dealerIndex = 7;
		} else if (dealer.getCard(1).getValue() == 10) {
			dealerIndex = 8;
		} else if (dealer.getCard(1).getName().equals("Ace")) {
			dealerIndex = 9;
		}
 
		System.out.println("(" + playerIndex + "," + dealerIndex + ")");
 
		return actions[playerIndex][dealerIndex].trim();
	}
 
 
}

Card.java

public class Card {
	private String name;
	private int value;
 
	public Card(String n, int v) {
		name = n;
		value = v;
	}
 
	public String getName() {
		return name;
	}
 
	public int getValue() {
		return value;
	}
 
	public String toString() {
		return name;
	}
}

Deck.java

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
 
 
public class Deck {
	private List<Card> cards;
	private List<Card> cardsback = new ArrayList<Card>();
 
	public Deck() {
		String names[] = {"Ace", "2", "3", "4", "5", "6", "7", "8", "9", "10", "Jack", "Queen", "King"};
 
		for (int j = 0; j < names.length; j++) {
			int val = j + 1;
 
			if (val > 10)
				val = 10;
 
			if (names[j].equals("Ace")) 
				val = 11;
 
			for (int k = 0; k < 4; k++)
				cardsback.add(new Card(names[j], val));
		}
 
		shuffle();
	}
 
	public Deck(int d) {
		String names[] = {"Ace", "2", "3", "4", "5", "6", "7", "8", "9", "10", "Jack", "Queen", "King"};
 
		for (int i = 0; i < d; i++) {
			for (int j = 0; j < names.length; j++) {
				int val = j + 1;
 
				if (val > 10)
					val = 10;
 
				if (names[j].equals("Ace")) 
					val = 11;
 
				Card c = new Card(names[j], val);
 
				for (int k = 0; k < 4; k++)
					cardsback.add(c);
			}
		}
 
		shuffle();
	}
 
	public List<Card> getDeck() {
		return cards;
	}
 
	public void shuffle() {
		cards = new ArrayList<Card>();
		cards.addAll(cardsback);
 
		Collections.shuffle(cards);
	}
 
	public Card draw() {
 
		Card c = new Card(cards.get(0).getName(), cards.get(0).getValue());
		cards.remove(0);
 
		return c;
	}
 
	public String toString() {
		String s = "";
 
		for (int i = 0; i < cards.size(); i++) {
			s = s + cards.get(i) + ", ";
		}
 
		s = s.substring(0, s.length() - 2);
 
		return s;
 
	}
}

Hand.java

import java.util.ArrayList;
 
 
public class Hand {
	private ArrayList<Card> cards;
	private int value;
 
	public Hand() {
		cards = new ArrayList<Card>();
	}
 
	public Hand(Hand h) {
		cards.addAll(h.getHand());
		getValue();
	}
 
	public Hand(ArrayList c) {
		cards = c;
	}
 
	public Card removeCard(int index) {
		Card c = cards.get(index);
		cards.remove(index);
		return c;
	}
 
	public void addCard(Card c) {
		cards.add(c);
		value += c.getValue();
	}
 
	public Card getCard(int pos) {
		return cards.get(pos);
	}
 
	public int getHandSize() {
		return cards.size();
	}
 
	public int getValue() {
		int nv = 0;
		for (int i = 0; i < cards.size(); i++) {
			nv += cards.get(i).getValue();
		}
 
		while (nv > 21) {
			checkAce();
		}
 
		value = nv;
 
		return value;
	}
 
	public ArrayList getHand() {
		return cards;
	}
 
	public void checkAce() {
		for (int i = 0; i < cards.size(); i++) {
			if (cards.get(i).getName().equals("Ace")) {
				value -= 10;
			}
		}
	}
 
	public boolean checkBlackjack() {
		if (getHandSize() == 2 && getValue() == 21) { 
			return true;
		}
 
		return false;
	}
 
	public String toString() {
		String s = "";
		for (int i = 0; i < cards.size(); i++) {
			s = s + cards.get(i) + ", ";
		}
 
		s = s.substring(0, s.length() - 2);
 
		return s;
	}
}

**GregBrannon** · November 24th, 2013, 11:23 AM

You're the first person I've seen use the break label; statement. It's a crutch. It's legal, but it's still a crutch to prop up a questionable design.

Since the while ( true ) loop is exiting unexpectedly, examine every possible exit and determine why one of them is causing the exit when you think it shouldn't be. Add print statements if you need to that clearly indicate when the while loop is being exited. It's also possible that the while ( true ) loop is consuming a system or JVM resource that causes the program to exit. I don't see it, but it's possible.

**dstars5** · November 24th, 2013, 11:41 AM

It isn't exactly "exiting" in the traditional sense. The program keep running, but it stops outputting anything. No crashes, no errors, nothing. Eclipse says it is running by the lack of output says it is not.

As for the break label;, how would you recommend I do it? I need to have loops in loops, and sometimes I need to end higher loops then the one I am in.

**Norm** · November 24th, 2013, 11:55 AM

Also posted at: while loop just stops looping

**dstars5** · November 24th, 2013, 12:04 PM

So? That is a different website? That thread was not getting me anywhere so I posted it here too..

**Norm** · November 24th, 2013, 12:11 PM

It's considerate to say where a problem has been posted so everyone that is trying to help can see what has already been done so they don't need to waste time repeating things already discussed.

That thread was not getting me anywhere

Several suggestions were made on that other site. Did you try any of them?

**dstars5** · November 24th, 2013, 03:59 PM

I did, but it still didn't work. Same problem.

**Norm** · November 24th, 2013, 04:08 PM

it still didn't work. Same problem.

Yes, those suggestions were for doing some debugging to find the problem. They would NOT fix the problem.

If the code now executes the same way every time (no random input and with a fixed deck),
now you need to add some println statements to show where the code is executing and how the values of the variables are changed as the code executes. This is a iterative process that can take several trials to narrow down where the bug is.

**dstars5** · November 24th, 2013, 04:13 PM

The loop is filled with printlns.. I said on the other one I was just using p() instead to make it shorter. I fail to see how adding more will do anything.

**Norm** · November 24th, 2013, 04:18 PM

I fail to see how adding more will do anything.

How many years of programming experience do you have?

Can you copy the full contents of the console from when you execute the program that has all the output from the print statements you currently have?

**dstars5** · November 24th, 2013, 04:24 PM

How many years of experience I have is absolutely irrelevant here.

This is everything the console outputs, as I stated in my original post.

**Norm** · November 24th, 2013, 04:32 PM

I suggest that you "fail to see" because you are a beginner.

the console outputs, as I stated in my original post.

Then you need to add LOTS more printlns that show where the code is executing and what the values are as it executes.

What is the last statement executed before the program "stops"?

**dstars5** · November 24th, 2013, 04:50 PM

I am not a "beginner", but thanks. Perhaps instead of questioning my experience, you could help me see.

The program stops at different points every time. The given output is an example, but it never stops at the same point.

**Norm** · November 24th, 2013, 04:58 PM

The program stops at different points every time.

It wouldn't if you had done what was suggested on the other site: Get rid of the shuffle. Have fixed user input.

What are the last statements executed for each time it "stops"?

**dstars5** · November 24th, 2013, 05:05 PM

I don't think you are understanding my properly.

If the deck is A, B, C, D, E, and F and I want to print out the shuffled deck, I don't mean it outputs:

C, D, E, F
then
B, C, A, D
etc.

I mean it might print out:
A, B, D
D, A, C, E
F, B

With each line being a different time the program ran. It isn't printing out everything that it SHOULD, regardless of order. Does that make sense?

**Norm** · November 24th, 2013, 05:09 PM

Is that related to the "it stops" problem? Have you found the last statement that executes before the program "stops"?

With each line being a different time the program ran

Changing the data every time the program executes sometimes makes it hard to find a problem. If the program always uses the same data, it will be easier.

**dstars5** · November 24th, 2013, 05:18 PM

My problem has nothing to do with the data. Each hand has different data, but not all of the hands are running. A different number run each time before I run into my problem. I couldn't care less about the data in each hand, right now I just need every hand to run.

**Norm** · November 24th, 2013, 05:30 PM

I thought you wanted to find why the program "stops"?
If the program is not stopping now, can you explain what the current problem is?

A different number run each time before I run into my problem.

That is because the shuffle() method changes the data every time the program executes. Its a moving target. Comment out the call to Collections.shuffle() and see what happens.

**dstars5** · November 24th, 2013, 05:37 PM

Look, ignore everything I have, alright?

If I came to you and said "Hey, I have this while loop that will sometimes freeze the program. The program doesn't actually stop, but there is no more output and nothing past the while loop runs. What might cause something like this to occur?", what would you say?

**Norm** · November 24th, 2013, 05:39 PM

Start adding some println statements to find where it is happening.

**dstars5** · November 24th, 2013, 05:43 PM

Ok, obviously you are losing me here. Would you be so kind as to show me how you would implement all of these printlns? Because I see no place that I might add more.

**Norm** · November 24th, 2013, 05:56 PM

I see no place that I might add more.

If you think a while() loop is going forever, add a println() inside of all the while loops.

**mageorge** · February 28th, 2014, 03:35 PM

Hey dstar5, I don't know if you ever solved this problem or if you're even still interested. I just joined the site and have been poking around to see what problems others are (or were) dealing with and I think I understand what's going on here. Have you considered looking outside of your Blackjack class for places to add additional traces? I think you are encountering an infinite loop, depending upon what card(s) are dealt.

**dicdic** · March 3rd, 2014, 01:17 AM

Hi dstar5 obviously there is a bug in your algorithm (a programmer's error maybe).
you are trying to solve it using prints.
Suggestion:
if your using any IDE, well, I think using its debug mode will make you solve your problem easily, without sweat, just put a break point on each break; statement, and in each conditional statements. and i'm sure you are going to trace where it stops. no sweat if your using IDE.

but if you are not using IDE, you can use the debug mode of java. using this command: jdb <class> (debug mode of java) instead of java <class.
And please be calm and polite to others that tried to help you. as what I see in your profile, you are intermediate level in java. that kind of bug is easy to trace and usually a big problem for beginners not for intermediate level.

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