Tic Tac Toe game. Everything works great except it will only let me place one O on the board and then it thinks the game is over...any idea what went wrong?

public class TicTacToeApplet extends JApplet implements ChangeListener, ActionListener { private JSlider slider; private JButton oButton, xButton; private Board board; private int lineThickness = 4; private Color oColor = Color.BLUE, xColor = Color.RED; static final char BLANK = ' ', O = 'O', X = 'X'; private char position[] = {BLANK, BLANK, BLANK, BLANK, BLANK, BLANK, BLANK, BLANK, BLANK}; private int wins = 0, losses = 0, draws = 0; @Override public void init() { //Build the panels JPanel topPanel = new JPanel(); topPanel.setLayout(new FlowLayout()); topPanel.add(new JLabel("Line Thickness:")); topPanel.add(slider = new JSlider(SwingConstants.HORIZONTAL, 1,20,4)); //Create the slider slider.setMajorTickSpacing(1); slider.setPaintTicks(true); slider.addChangeListener(this); //Add buttons to the panels topPanel.add(oButton = new JButton("O Color")); topPanel.add(xButton = new JButton("X Color")); oButton.addActionListener(this); xButton.addActionListener(this); //Add the panels to the content pane. add(topPanel, BorderLayout.NORTH); add(board = new Board(), BorderLayout.CENTER); setVisible(true); } //Handles the change events that are generated when the slider is moved @Override public void stateChanged(ChangeEvent e) { lineThickness = slider.getValue(); board.repaint(); } @Override public void actionPerformed(ActionEvent e) { if (e.getSource() == oButton) { Color newColor = JColorChooser.showDialog(this,"Choose a new color" + "for O", oColor); if(newColor != null) oColor = newColor; } else if (e.getSource() == xButton) { Color newColor = JColorChooser.showDialog(this,"Choose a new color" + "for X", xColor); if (newColor != null) xColor = newColor; } board.repaint(); } private class Board extends JPanel implements MouseListener { private Random random = new Random(); private int rows[][]= {{0,2}, {3,5}, {6,8}, {0,8}, {2,6}}; public Board() { //Add a mouse listener addMouseListener(this); } /** * paintComponent method * @param g The panels Graphic object. */ @Override public void paintComponent(Graphics g) { //Call the superclass paintComponent method super.paintComponent(g); //Set width and hight of board int w = getWidth(); int h = getHeight(); Graphics2D g2d = (Graphics2D) g; //Create the board g2d.setPaint(Color.WHITE); g2d.fill(new Rectangle2D.Double(0,0,w,h)); g2d.setPaint(Color.BLACK); g2d.setStroke(new BasicStroke(lineThickness)); g2d.draw(new Line2D.Double(0, h/3, w, h/3)); g2d.draw(new Line2D.Double(0, h*2/3, w, h*2/3)); g2d.draw(new Line2D.Double(w/3, 0, w/3, h)); g2d.draw(new Line2D.Double( w*2/3, 0, w*2/3, h)); for (int i = 0; i < 9; ++i) { double xpos = (i % 3 + 0.5)* w / 3.0; double ypos = (i / 3 + 0.5)* h / 3.0; double xr = w / 8.0; double yr = h / 8.0; if(position[i] == O) { g2d.setPaint(oColor); g2d.draw(new Ellipse2D.Double(xpos-xr, ypos-yr, xr*2, yr*2)); } else if (position[i] == X) { g2d.setPaint(xColor); g2d.draw(new Line2D.Double(xpos-xr, ypos-yr, xpos +xr, ypos+yr)); g2d.draw(new Line2D.Double(xpos-xr, ypos+yr, xpos+xr, ypos-yr)); } } } //Draw an O where the mouse is clicked @Override public void mouseClicked(MouseEvent e) { int xpos = e.getX()* 3 /getWidth(); int ypos = e.getY()* 3 /getHeight(); int pos = xpos + 3 * ypos; if(pos >= 0 && pos < 9 && position[pos] == BLANK) { position[pos] = O; repaint(); putX(); repaint(); } } public void mousePressed(MouseEvent e){} public void mouseReleased(MouseEvent e){} public void mouseEntered(MouseEvent e){} public void mouseExited(MouseEvent e){} void putX() { if (won(O)) newGame(O); else if (isDraw()); newGame(BLANK); { nextMove(); if(won(X)) newGame(X); else if (isDraw()); newGame(BLANK); } } boolean won(char player) { for (int i = O; i<8; ++i) if (testRow(player, rows[i][0], rows [i][1])) return true; return false; } boolean testRow(char player, int a,int b) { return position[a] == player && position[b] == player && position[(a+b)/2] ==player; } void nextMove() { int r = findRow(X); if (r<0) r = findRow(O); if (r<0) { do r = random.nextInt(9); while(position[r] != BLANK); } position[r] = X; } int findRow(char player) { for(int i = 0; i < 8; ++i) { int result = find1Row(player, rows[i][0], rows[i][1]); if (result >= 0) return result; } return -1; } int find1Row(char player, int a, int b) { int c=(a+b)/2; // middle spot if (position[a]==player && position[b]==player && position[c]==BLANK) return c; if (position[a]==player && position[c]==player && position[b]==BLANK) return b; if (position[b]==player && position[c]==player && position[a]==BLANK) return a; return -1; } boolean isDraw() { for (int i=0; i<9; ++i) if (position[i]==BLANK) return false; return true; } void newGame(char winner) { repaint(); String result; if (winner==O) { ++wins; result = "You Win!"; } else if (winner==X) { ++losses; result = "I Win!"; } else { result = "Tie"; ++draws; } if (JOptionPane.showConfirmDialog(null, "You have "+wins+ " wins, " +losses+" losses, "+draws+" draws " +"Play again?", result, JOptionPane.YES_NO_OPTION) !=JOptionPane.YES_OPTION) { wins = losses = draws = 0; } for (int j=0; j<9; ++j) position[j]=BLANK; if ((wins + losses + draws)%2 == 1) nextMove(); } } }