如何在鼠标单击Jpanel的地方绘制填充的椭圆形

Question

I want to write a code to draw a filled oval where ever the mouse is clicked inside a panel. I used to develop some codes but unfortunately when I tried to do the next click the whole panel blanked and new point appeared. I want to keep the previous points and add some new ones by the next user's click on the panel. How do I implement the paint component of MyPanel ? Here is my code; it does not work properly, because it produces some small points instead of rectangle.

class MyPanel extends JPanel {
Point pointClicked;

public MyPanel() {
     this.addMouseListener(new MouseAdapter() {
        @Override
         public void mouseClicked(MouseEvent e) {
             pointClicked = e.getPoint();
         }
     });
}
@Override
public void paintComponent(Graphics g) {
    super.paintComponent(g);
    g.fillRect(pointClicked.x, pointClicked.y, 1, 1);
}
}

Answer 1

I want to keep the previous points and add some new ones by the next user's click on the panel.

You need to keep track of each oval painted and repaint all ovals each time the paintComponent() method is called.

Check out Custom Painting Approaches for two different ways to do this