Drawing in JPanel vs JComponent

Question

I need some help understanding why the drawing works differently in JComponent vs JPanel.

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Gr         


        

Answer 1

Call super.paintComponent(g) in paintComponent implementation.

public void paintComponent(Graphics g) {
  super.paintComponent(g);

  Graphics2D g2d = (Graphics2D) g.create();
  g2d.setColor(getColor());
  g2d.fillRect(x, y, 4, 4);

}