Thread: Why do I get a null value?

package wargame;

import java.util.*;

public class Table {

public int n, p, c;
public LinkedList<String> shuffle = new LinkedList<String>();
public LinkedList<String> card = new LinkedList<String>();
public CompleteDeckCard getcard = new CompleteDeckCard();
LinkedList<String> playerNum = new LinkedList();
LinkedList<String> shuffledCards = cardShuffle();
public LinkedList<String> rank = new LinkedList<String>();
public CompleteDeckCard getrank = new CompleteDeckCard();
boolean winner;
//Determining the number of shuffles
public int tablePlay() {
System.out.println ("How many shuffles do you want? ");
Scanner in = new Scanner(System.in);
n = in.nextInt();
System.out.println ("Your input is: " + n);
System.out.println ("Shuffling cards, please wait a moment ...");
return n;
}

//Shuffling of cards
public LinkedList<String> cardShuffle(){
card = getcard.cards();

for (int sc = 0; sc < n; sc++){
for( int x=0, y=26; x<26; x++,y++){
shuffle.add(card.get(x));
shuffle.add(card.get(y));
}
card.clear();
card.addAll(shuffle);
shuffle.clear();
}
//System.out.println("New Deck: " + shuffle);
return card;
}

//Determining the number of players
public LinkedList<String>[] player() {
rank = getrank.ranks();
Scanner in = new Scanner(System.in);
p = in.nextInt();
System.out.println ("Number of players: " + p);
System.out.println ("Creating list of players ... " );
//return p;

//Distribution of cards
shuffledCards = cardShuffle();
LinkedList<String>[] playerNum = new LinkedList[p];
for (int z=0; z<p; z++){
playerNum[z] = new LinkedList<String>();
System.out.println ("playerNum[" + z + "]");
}
while (!shuffledCards.isEmpty()){
for (int v=0; v<p; v++){
playerNum[v].addFirst(shuffledCards.pollFirst());
if (playerNum[v].contains(null))
playerNum[v].remove(null);
}
}
System.out.println (" ");
System.out.println ("Distributing cards ...");
for (int m=0; m<p; m++){
System.out.println ("playerNum[" + m + "]" + playerNum[m] );
}

//Getting the top card

while (!winner){
LinkedList<String> getTopCards = new LinkedList<String>();
for (int g=0; g<p; g++){
getTopCards.add(playerNum[g].pollFirst());
}
System.out.println (" ");
System.out.println ("Top Cards: " + getTopCards);
System.out.println (" ");

//Comparing the values

LinkedList<Integer> evaluate = new LinkedList<Integer>();
Collections.reverse(rank);
System.out.println ("Order of card: " +rank);
for( int s = 0; s < getTopCards.size(); s++){
evaluate.add(rank.indexOf(getTopCards.get(s)));
}
System.out.println(" ");
//System.out.println("Ranking: " + evaluate);

int e = evaluate.indexOf(Collections.max(evaluate));
System.out.println( "playerNum[" + e + "] is the winner. ");
System.out.println(" " );

//Collect the initial cards and give to the winner of the round

LinkedList<String> entry = new LinkedList<String>();
for (int d=e; d<p; d++){
entry.add(getTopCards.get(d));
}
if (e!=0){
for (int f=0; f<e; f++){
entry.add(getTopCards.get(f));
}
}
playerNum[e].addAll(entry);
while (playerNum[e].contains(null)){
playerNum[e].remove(null);
}

System.out.println ("Collected cards: " + entry);

//Determine number of rounds

LinkedList<Integer> rounds = new LinkedList<Integer> ();


for (int g=0; g<p; g++){
System.out.println (playerNum[g]);
//for (int h=0; h<p; h++){
if (playerNum[g].size() == 52){
winner = true;
break;
}
}
//}
}
return playerNum;
}
}

I am sorry about the long code. I thought it would be helpful for readers to see everything. I really don't know yet how to implement the Exceptions.
I seem to have traced the problem. I just do not know how to tell the program to skip the particular list and proceed to the next entry.

while (!winner){
		LinkedList<String> getTopCards = new LinkedList<String>();
			for (int g=0; g<p; g++){
				getTopCards.add(playerNum[g].pollFirst());

I am trying to loop this particular until all the cards go to a single player. What happens is whenever one of the players loses all his cards, the program register null only to be able to proceed to the goal of giving all the cards to only 1 player.