Drawing thick line

Question

Hi,
For some graphical user interface, I was overriding PaintComponent() method with Graphics argument and then using drawLine() method of Graphics class of Java. It worked in the way I wanted. However, the lines drawLine() method draws are too thin. For that purpose, I defined paintComponent() method with Graphics2D class to use its setStroke() method. I left all previously defined methods, namely drawRect() and fillOval() unchanged due to the fact that Graphics2D class extend Graphics class. However, now no input is displayed on myJFrame although I get no compile errors. Has anyone idea about the problem?
Thanks in advance,

Answer 1

public void paintComponent(Graphics2D g)
     for(int i=0; i<myBoard.size; i++)
          for(int j=0; j<myBoard.size; j++)
               g.setColor (Color.black);
               g.drawRect (50*j, 50*i, 50, 50);
               if(myBoard.board[i*2][j*2] == 1)
                    g.setColor (Color.black);
                    g.fillOval (50*j, 50*i, 50, 50);
               else if(myBoard.board[i*2][j*2] == 2)
                    g.setColor (Color.lightGray);
                    g.fillOval (50*j, 50*i, 50, 50);
     int width = 3;
     BasicStroke bs = new BasicStroke(width);
     g.setStroke(bs);
     g.setColor (Color.red);
     for(int i=0; i<myBoard.size*2-1; i++)
          for(int j=0; j<myBoard.size*2-1; j++)
               if(myBoard.board[i][j] == 3)
                    g.drawLine(j*25, (i+1)*25, (j+2)*25, (i+1)*25);
               else if(myBoard.board[i][j] == 4)
                    g.drawLine((j+1)*25, i*25, (j+1)*25, (i+2)*25);
public static void main(String args[])
       JFrame frame = new JFrame("Output");
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     frame.setLayout(new GridLayout());
     Main panel = new Main();
     frame.add(panel);
     frame.setSize(50*myBoard.size+8, 50*myBoard.size+33);
     frame.setVisible(true);
}I was hoping to see thick lines but there is displayed nothing on the frame, I don't know why (Why?). (It gives thin lines when I change argument of paintComponent from Graphics2D to Graphics and comment out 3 lines using setStroke().)