What's Wrong With My biggestWinners?

public ArrayList <LotteryTicket> tickets;
private double highWin = -1.00, highStateWin = -1.00;
private LotteryTicket stateHighest = null, highest = null;

    //------------------------------------------------------------------
    // Returns who won the most prize money for this drawing.
    //------------------------------------------------------------------
    public LotteryTicket getBiggestWinner(){
        makePayouts();
        highest = null;
        highWin = -1.00;

        for(LotteryTicket t: tickets){
            // Checks to see if the ticket's prize is higher than the
            // current highest prize.
            if (t.getPrize() > highWin){
                // If the ticket's prize is higher than the current highest
                // prize, that ticket becomes the new highest prize winner.
                highWin = t.getPrize();
                highest = t;
            }
        }

        // Returns the highest winning ticket.
        return highest;
    }

    //------------------------------------------------------------------
    // Returns who won the most prize money in a given state for this
    // drawing.
    //------------------------------------------------------------------
    public LotteryTicket getBiggestStateWinner(String st){
        makePayouts();
        stateHighest = null;
        highStateWin = -1.00;

        int stateCounter = 0;
        for(LotteryTicket t: tickets){
            // Checks to see if the ticket was filed in the entered state.
            if (t.getState().equalsIgnoreCase(st) == true){
                // Checks to see if the ticket's prize is higher than the
                // current highest prize.
                if (t.getPrize() > highStateWin){
                    // If the ticket's prize is higher than the current highest
                    // prize, that ticket becomes the new highest prize winner.
                    highStateWin = t.getPrize();
                    stateHighest = t;
                }
                // Adds 1 to the number of tickets found in the entered state,
                // whether it was highest or not.
                stateCounter++;
            }
        }

        if (stateCounter == 0){
            // If no tickets were filed for the entered state,
            // the program will return null.
            return null;
        }else{
            // Otherwise, the program will return the highest
            // winning ticket for the entered state.
            return stateHighest;
        }
    }