Paint() method in an entity class

Question

Hi,
I am trying to draw 2 shapes in a Canvas, one rectangle and a circle.
However, I have an entity class for both the rectangle and the circle, something like:
public class MyRectangle
private int width, height;
public MyRectangle() { ... }
pulbic getWidth() { return width; }
pulbic getHeight() { return Height; }
I do not want to draw these 2 shape in the paint() method of the Canvas, I want my Rectangle class and my Circle to have their own paint method to draw themselves into the canvas, is it possible?
If it is possible, can you tell me roughly how to do it?
Do I have to extend the Component class?
Thanks in advance.
SK

Answer 1

Hi,
I tried to do what you mentioned as the following, but I cant get the circle display on the screen, do you know why? Thanks
public class Ball extends Component
private static final int diameter = 15;
private int xPosition = 10, yPosition = 10;
public Ball()
public int getX() { return xPosition; }
public int getY() { return yPosition; }
public int getDiameter() { return diameter; }
public void paint(Graphics g)
     super.paint(g);
Graphics2D graphics2D = (Graphics2D)g;
graphics2D.fillOval(xPosition, yPosition, diameter, diameter);
public class MyFrame extends JFrame
public MyFrame()
// Set up the main frame
super("Test");
setPreferredSize(new Dimension(400, 300));
Container contentPane = getContentPane();
     Ball aBall = new Ball();
     JPanel myPanel = new JPanel();
     myPanel.setBackground(Color.white);
     myPanel.setBorder(BorderFactory.createLineBorder(Color.black));
     myPanel.setOpaque(true);
myPanel.add(aBall);
     contentPane.add(myPanel, BorderLayout.CENTER);     
pack();
/** The main method */
public static void main(String[] args)
     MyFrame myFrame = new MyFrame();
myFrame.setVisible(true);
}