GUI is stable and can handle board changes. It's ugly, but it works.

Client.java

@@ -14,35 +14,136 @@ import javax.swing.*;
 import javax.*;
 import java.awt.*;
 import java.awt.geom.*;
+import java.awt.event.*;
+import java.awt.image.BufferedImage;
+import javax.swing.border.*;
+import java.net.URL;
+import javax.imageio.ImageIO;
+import java.awt.image.*;
 //import javax.swing.text.html.parser.ParserDelegator;
 
-public class Client extends JFrame {
+public class Client {
+	
+	private final JPanel gui = new JPanel(new BorderLayout(3, 3));
+	private JButton[][] boardSquares = new JButton[8][8];
+	private Image[] pieceImages = new Image[2];
+	private JPanel boardPanel;
+	private static final String Columns = "ABCDEFGH";
+	public static final int BLACK = 0, WHITE = 1;
 	
 	public Client() {
-		this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+		initializeGui();
 	}
 	
-	public void drawBoard(String b) {
+	public final void initializeGui() {
-		board = b;
+		createImages();
-		bp = new BoardPanel();
+		
-		board = TrimBoard();
+		gui.setBorder(new EmptyBorder(5,5,5,5));
-		JFrame frame = new JFrame("Breakthrough");
+		
-		frame.getContentPane().add(BorderLayout.CENTER, bp);
+		boardPanel = new JPanel(new GridLayout(0, 9)) {
-		frame.setSize(800, 600);
+			
-		frame.setLocationRelativeTo(null);
+            /**
-		frame.setVisible(true);
+             * Override the preferred size to return the largest it can, in
-		bp.DrawPieces();
+             * a square shape.  Must (must, must) be added to a GridBagLayout
-		/*
+             * as the only component (it uses the parent as a guide to size)
-		Graphics test = getGraphics();
+             * with no GridBagConstaint (so it is centered).
-		test.clearRect(0, 0, 800, 600);
-		test.setColor(Color.black);
              */
-		//frame.getContentPane().add(test, BorderLayout.CENTER);
+			@Override
-		//this.paint(test);
+			public final Dimension getPreferredSize() {
-		//frame.repaint();
+                Dimension d = super.getPreferredSize();
+                Dimension prefSize = null;
+                Component c = getParent();
+                if (c == null) {
+                    prefSize = new Dimension(
+                            (int)d.getWidth(),(int)d.getHeight());
+                } else if (c!=null &&
+                        c.getWidth()>d.getWidth() &&
+                        c.getHeight()>d.getHeight()) {
+                    prefSize = c.getSize();
+                } else {
+                    prefSize = d;
+                }
+                int w = (int) prefSize.getWidth();
+                int h = (int) prefSize.getHeight();
+                // the smaller of the two sizes
+                int s = (w>h ? h : w);
+                return new Dimension(s,s);
+			}
+		};
+		boardPanel.setBorder(new CompoundBorder(
+				new EmptyBorder(8,8,8,8),
+				new LineBorder(Color.BLACK)
+				));
+		// Set BG.
+		Color background = new Color(100,100,100);
+		Color boardbg = new Color(250, 200, 100);
+		boardPanel.setBackground(background);
+		JPanel boardConstrain = new JPanel(new GridBagLayout());
+		boardConstrain.setBackground(background);
+		boardConstrain.add(boardPanel);
+		gui.add(boardConstrain);
+		
+		Insets buttonMargin = new Insets(0,0,0,0);
+		for(int r = 0; r < boardSquares.length; ++r) {
+			for(int c = 0; c < boardSquares.length; ++c) {
+				Action selectPiece = new AbstractAction("") {
+					@Override
+					public void actionPerformed(ActionEvent e) {
+						sendLocation();
+					}
+				};
+				JButton b = new JButton();
+				b.setMargin(buttonMargin);
+				b.setAction(selectPiece);
+				
+				ImageIcon icon = new ImageIcon( new BufferedImage(64, 64, BufferedImage.TYPE_INT_ARGB));
+				b.setIcon(icon);
+				b.setBackground(boardbg);
+				boardSquares[r][c] = b;
+			}
 		}
 		
-	public String TrimBoard() {
+		// fill the board.
+		boardPanel.add(new JLabel(""));
+		// fill the top row
+		for(int c = 0; c < 8; c++) {
+			boardPanel.add(new JLabel(Columns.substring(c, c + 1), SwingConstants.CENTER));
+		}
+		// fill everything else
+		for(int r = 0; r < 8; ++r) {
+			for(int c = 0; c < 8; c++) {
+				switch(c) {
+					case 0: boardPanel.add(new JLabel("" + (9 - (r + 1)), SwingConstants.CENTER));
+					
+					default: boardPanel.add(boardSquares[r][c]);
+				}
+			}
+		}
+	}
+	
+	public final JComponent getGui() {
+		return gui;
+	}
+	
+	private final void createImages() {
+		try {
+			URL url1 = new URL("http://www.iconsdb.com/icons/preview/black/circle-xxl.png");
+			BufferedImage bi = ImageIO.read(url1);
+			Image img = bi.getScaledInstance(64, 64, BufferedImage.SCALE_FAST);
+			pieceImages[0] = img;
+			
+			URL url2 = new URL("http://www.iconsdb.com/icons/preview/white/circle-xxl.png");
+			bi = ImageIO.read(url2);
+			img = bi.getScaledInstance(64, 64, BufferedImage.SCALE_FAST);
+			pieceImages[1] = img;
+		}
+		catch (Exception e) {
+			e.printStackTrace();
+			System.exit(1);
+		}
+	}
+	
+	public String TrimBoard(String board) {
 		String output = "";
 		for(int i = 0; i < board.length(); ++i) {
 			if(board.charAt(i) == 'X') {
@@ -60,61 +161,44 @@ public class Client extends JFrame {
 		return output;
 	}
 
-	class BoardPanel extends JPanel {
+	public final void updateBoard(String board) {
-		public void DrawPieces() {
+		board = TrimBoard(board);
-			Graphics g = getGraphics();
+		int count = 0;
-			g.clearRect(0, 0, 800, 600);
+		ImageIcon icon = new ImageIcon( new BufferedImage(64, 64, BufferedImage.TYPE_INT_ARGB));
-			g.setColor(Color.black);
+		for(int r = 0; r < 8; ++r) {
-			this.validate();
+			for(int c = 0; c < 8; c++) {
-			//add("Center", new BoardCanvas());
+				if(board.charAt(count) == 'X') {
-			
+					boardSquares[r][c].setIcon(new ImageIcon(pieceImages[0]));
-			//background.setRect(0.0, 0.0, 800.0, 600.0);
+				}
-			//back = background;
+				else if(board.charAt(count) == 'O') {
-			//back.setPaint(0, 0, 0);
+					boardSquares[r][c].setIcon(new ImageIcon(pieceImages[1]));
-			//g.draw(background);
+				}
+				else {
+					boardSquares[r][c].setIcon(icon);
+				}
+				count++;
+			}
+		}
+		if(board.charAt(count) == 'X') {
+			boardSquares[7][7].setIcon(new ImageIcon(pieceImages[0]));
+		}
+		else if(board.charAt(count) == 'O') {
+			boardSquares[7][7].setIcon(new ImageIcon(pieceImages[1]));
+		}
+		else {
+			boardSquares[7][7].setIcon(icon);
 		}
 	}
 	
-	class BoardCanvas extends Canvas {
+	public void sendLocation() {
-		public void paint(Graphics graphics) {
-			Graphics2D g = (Graphics2D) graphics;
-			
-			Shape pieces[] = new Shape[32];
-			
-			int c = 0;
-			
-			Shape sh = new Ellipse2D.Double(0,0,100,100);
-			g.draw(sh);
-			
-			for(int x = 0; x < board.length(); ++x) {
-				if(board.charAt(x) == 'X') {
-					pieces[c] = new Ellipse2D.Double((((x%8) + 1)*10), ((x/8)*20), 10, 10);
-					c++;
-				}
-				
-				else if(board.charAt(x) == 'O') {
-					pieces[c] = new Ellipse2D.Double((((x%8) + 1)*10), ((x/8)*20), 10, 10);
-					c++;
-				}
-			}
-			
-			for(int s = 0; s < pieces.length; ++s) {
-				if(pieces[s] != null) {
-					g.draw(pieces[s]);
-				}
-			}
 		
 	}
-	}
-	
 	
 	public static void main (String[] args) {
 		Scanner keyboard = new Scanner(System.in);
 		String hostname = args[0];
 		int portnum = Integer.parseInt(args[1]);
 		
-		Client window = new Client();
-		
 		try {
 			Socket echoSocket = new Socket(hostname, portnum);
 			PrintWriter output = new PrintWriter(echoSocket.getOutputStream(), true);
@@ -139,6 +223,17 @@ public class Client extends JFrame {
 			boolean end = false;
 			int c = 0;
 			
+			Client window = new Client();
+			
+			JFrame frame = new JFrame("Breakthrough");
+			frame.add(window.getGui());
+			
+			frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
+			frame.setLocationByPlatform(true);
+			frame.pack();
+			frame.setMinimumSize(frame.getSize());
+			frame.setVisible(true);
+			
 			while(!end && (userInput != null)) {
 				userInput = stdIn.readLine();
 				output.println(userInput);
@@ -151,20 +246,15 @@ public class Client extends JFrame {
 					}
 				}
 				System.out.println(String.valueOf(buffer).trim());
-				window.drawBoard(String.valueOf(buffer).trim());
+				window.updateBoard(String.valueOf(buffer).trim());
 			}
 			output.close();
 			in.close();
 			stdIn.close();
 			echoSocket.close();
 		}
-		
 		catch (IOException e){
 			System.err.println("IOException: " + e.getMessage());
 		}
 	}
-	
-	String board;
-	
-	BoardPanel bp;
 }