private void initComponents() {
        setBackground(new java.awt.Color(255, 255, 255));
        setMaximumSize(new java.awt.Dimension(600, 600));
        setMinimumSize(new java.awt.Dimension(600, 600));
        setPreferredSize(new java.awt.Dimension(600, 600));
        setLayout(new java.awt.FlowLayout(java.awt.FlowLayout.LEFT, 0, 0));
        
        for(int i=0;i<board.length;i++)
        	for(int j=0;j<board[i].length;j++){
        		if((i==4 || i==5) && (j==2 || j==3 || j==6 || j==7))
        			board[i][j] = new NullBox(i,j);
        		else
        			board[i][j] = new Box(i,j, mf, this);
        		add(board[i][j]);
        	}
    }