center???

.... i'd like to ask if anyone can help me get the board centered???

package chessbuard;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
//import javax.swing.event.*;
import javax.swing.border.Border;

class ChessBoard extends JFrame implements MouseListener,
MouseMotionListener {

     GridLayout Board = new GridLayout(8, 8);
     int drag1, drag2;
     int xMove, yMove, labelw, labelh;
     JLabel label;
     String[] manrow = {"Pawn0", "Pawn1", "Pawn2", "Pawn3", "Pawn4",
"Pawn5", "Pawn6", "Pawn7"};
     String[] manrowx = {"Pawn0", "Pawn1", "Pawn2", "Pawn3", "Pawn4",
"Pawn5", "Pawn6", "Pawn7"};
     String[] piecerow = {"Rook", "Knight", "Bishop", "Queen", "King",
"Bishop", "Knight", "Rook"};
     String[] piecerowx = {"Rook", "Knight", "Bishop", "Queen", "King",
"Bishop", "Knight", "Rook"};

// update these labels position, which is parent jpanel, at each move
     JPanel[][] grids;
     JLabel[][] pieces;
     Dimension pieceSize = new Dimension(100, 100);
     Container con;
     Component DraggingComp;
     GridLayout board;

     public ChessBoard() {
         super("ChessBoard");
         setDefaultCloseOperation(EXIT_ON_CLOSE);

         board = new GridLayout(8, 8);
         board.setHgap(4);
         board.setVgap(4);
         Dimension boardSize = new Dimension(800, 800);
         con = getContentPane();
         new GridChessBoard();
         con.addMouseListener(this);
         con.addMouseMotionListener(this);
         grids = new JPanel[8][8];
         pieces = new JLabel[8][8];
         label = new JLabel("Pawn3");
         Dimension d = label.getPreferredSize();
         labelw = d.width;
         labelh = d.height;
         label.setBounds(10, 10, labelw, labelh);
         setDefaultCloseOperation(EXIT_ON_CLOSE);

         //setVisible(true);
         for (int i = 0; i < 8; ++i) {
             for (int j = 0; j < 8; ++j) {
                 addSquares(i, j);
             }
         }

         setSize(boardSize);
        // setVisible(true);
     } // end constructor

     public JFrame addAction(JFrame frame) {
         frame.getContentPane().addMouseMotionListener(this);
         return frame;
     }

    public void seeIt(Component c) {
         con.add(c);
         ((JPanel) con).revalidate();
         con.setVisible(true);
     }

     public void moveComponent(Component c, int newX, int newY, int
width, int height) {
         System.out.println("in moveComponent");
         c.setBounds(newX, newY, labelw, labelh);
         c.setSize(pieceSize); // debug, just to see
         con.add(c);
         ((JPanel) con).revalidate();
         con.setVisible(true);
     }

     public String getMan(int i) {
         return manrow[i];
     }

     public String getPiece(int i) {
         return piecerow[i];
     }

     public boolean isOdd(int i) {
         return i % 2 != 0;
     }

     public boolean isEven(int i) {
         return i % 2 == 0;
     }

     public JLabel setBlue(JLabel b1) {
         b1.setBackground(Color.blue);
         return b1;
     }

     public JLabel setYellow(JLabel b1) {
         b1.setBackground(Color.yellow);
         return b1;
     }

     public void addColors() {
         for (int i = 0; i < 64; i++) {
             JLabel square = new JLabel("see");
             add(square);
             int row = (i / 8) % 2;
             if (row == 0) {
                 square.setBackground(i % 2 == 0 ? Color.blue :
Color.yellow);
             } else {
                 square.setBackground(i % 2 == 0 ? Color.yellow :
Color.blue);
             }
         }
     }

     public JLabel addBlankRow(int i, int j) {
         JLabel square = new JLabel();
         if (isEven(j)) {
             square.setBackground(i % 2 == 0 ? Color.yellow : Color.blue);
             square.setName("blank"); // added
         } else {
             square.setBackground(i % 2 == 0 ? Color.blue : Color.yellow);
             square.setName("blank"); // added
         }
         return square;
     }

     public JLabel addManRow(int i, int j) {
         String[] m = i == 1 ? manrowx : manrow;
         JLabel square = new JLabel();
         square.setLayout(new FlowLayout());

         int col = j + 1;
         if (isEven(col)) {
             square.setBackground(i % 2 == 0 ? Color.blue : Color.yellow);
             square.add(setYellow(new JLabel(m[j])), JLabel.CENTER);
             square.setName(m[j]);// added
         } else {
             square.setBackground(i % 2 == 0 ? Color.yellow : Color.blue);
             square.add(setBlue(new JLabel(m[j])), JLabel.CENTER);
             square.setName(m[j]); // added
         }
         return square;
     }

     public JLabel addPieceRow(int i, int j) {

         String[] m = i == 1 ? piecerow : piecerowx;
         JLabel square = new JLabel();
         square.setLayout(new FlowLayout());

         int col = j;
         if (isEven(col) && (col < 8)) {

             square.add(setYellow(new JLabel(m[j])), JLabel.CENTER);
             square.setBackground(Color.yellow);
             square.setName(m[j]); // added
         } else {
             square.add(setBlue(new JLabel(m[j])), JLabel.CENTER);
             square.setBackground(Color.blue);
             square.setName(m[j]); // added

         }
         return square;
     }

     public JLabel addPieceRowx(int i, int j) {
         String[] m = i == 1 ? manrowx : manrow;
         JLabel square = (new JLabel(m[j]));
         square.setLayout(new FlowLayout());

         int col = j + 1;
         if (isEven(col)) {
             square.setBackground(Color.yellow);
             square.add(setYellow(new JLabel(m[j])), JLabel.CENTER);
             square.setName(m[j]); // added
         } else {
             square.setBackground(Color.blue);
             square.add(setBlue(new JLabel(m[j])), JLabel.CENTER);
             square.setName(m[j]); // added
         }
         return square;
     }

     public JLabel addManRowx(int i, int j) {
         String[] m = i == 1 ? manrowx : manrow;
         JLabel square = new JLabel();
         square.setLayout(new FlowLayout());

         int col = j + 1;
         if (isEven(col)) {
             square.setBackground(Color.blue);
             square.add(setBlue(new JLabel(m[j])), JLabel.CENTER);
             square.setName(m[j]); // added
         } else {
             square.setBackground(Color.yellow);
             square.add(setYellow(new JLabel(m[j])), JLabel.CENTER);
             square.setName(m[j]); // added
         }
         return square;
     }

     public void addSquares(int i, int j) {

         JLabel square = new JLabel();
         int col = j;
         int row = i;
         switch (row) {
             case 0:
                 square = addPieceRow(row, col);
                 break;
             case 1:
                 square = addManRow(row, col);
                 break;
             case 2:
                 square = addBlankRow(row, col);
                 break;
             case 3:
                 square = addBlankRow(row, col);
                 break;
             case 4:
                 square = addBlankRow(row, col);
                 break;
             case 5:
                 square = addBlankRow(row, col);
                 break;
             case 6:
                 square = addManRowx(row, col);
                 break;
             case 7:
                 square = addPieceRowx(row, col);
                 break;
         }
         con.add(square);
         return;
     }

     public void mousePressed(MouseEvent me) {
         System.out.println("in mouse pressed");

         // get orriginal coordinates and set text
         xMove = me.getX();
         yMove = me.getY();
         DraggingComp = con.getComponentAt(xMove, yMove);
     }

     public void mouseDragged(MouseEvent me) {

         System.out.println("in mouse dragged");
         DraggingComp = con.getComponentAt(xMove, yMove);
         if (DraggingComp == null) {
             return;
         }
         xMove = me.getX();
         yMove = me.getY();
         //moveComponent(findComponentAt(xMove, yMove), xMove, yMove,
labelw, labelh);
     }

     public void mouseReleased(MouseEvent me) {
     }

     public void mouseEntered(MouseEvent me) {
     }

     public void mouseExited(MouseEvent me) {
     }

     public void mouseMoved(MouseEvent me) {
     }

     public void mouseClicked(MouseEvent me) {
     }
     static class GridChessBoard { // must be static???

         JFrame frame;
         Container con;

         public GridChessBoard() {
             frame = new JFrame("Chess Board made by Hiroshi Iwatani");
             frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
             con = frame.getContentPane();

             con.setLayout(new GridLayout(8, 8));
             for (int i = 0; i < 64; i++) {
                 JPanel square = new JPanel(new BorderLayout());
                 Border blackline;
                 blackline = BorderFactory.createLineBorder(Color.black);
                 square.setBorder(blackline);
                 con.add(square);

                 int row = (i / 8) % 2;
                 if (row == 0) {
                     square.setBackground(i % 2 == 0 ? Color.blue :
Color.yellow);
                 } else {
                     square.setBackground(i % 2 == 0 ? Color.yellow :
Color.blue);
                 } // add pieces/men

                 for (int k = 0; k < 8; ++k) {
             for (int j = 0; j < 8; ++j) {
                 //addSquares(k, j);
             }
         }

                 frame.setSize(450, 450);
                 frame.setVisible(true);
             }
         }
     }

     public static void main(String[] args){
         //GridChessBoard gcb = new GridChessBoard();
         new ChessBoard();
     }
}