Simple, funny but annoying question, putting a pixel

Question

Maybe this could be simple, funny but annoying question.
How do you put a pixel or draw a pixel?
Is there a method to draw a pixel directly on screen in j2SDK API?

Answer 1

This is a very open ended question, do you want to draw a pixel in an image or just draw a shape on the screen?
If you want to edit single pixels at a time then the best option is to create a BufferedImage and use the WritableRaster to edit the pixels you want by using setPixel().
Something like the following:
BufferedImage img = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
WritableRaster raster = img.getRaseter();
raster.setPixel(x_coord, y_coord, new int[]{R_val, G_val, B_val});This image can then be displayed by putting it in a JLabel (there are many other techniques but I find this the easiest method).
JLabel l = new JLabel(new ImageIcon(img));
JFrame jf = new JFrame();
jf.setContentPane(l);
jf.pack();Alternatively, you can draw shapes by using Graphics or Graphics2D objects
e.g.
public class MyPanel extends JPanel
  public void paintComponent(Graphics2D g)
     super.paintComponent(g);
     g.drawLine(x1,y1,x2,y2);
}Hope this helps,
Stef