Draw a pixel: Difference between revisions

=={{header|Java}}==

Basic Implementation via subclass of JFrame:

<lang Java>import java.awt.Color;

import java.awt.Graphics;

import javax.swing.JFrame;

public class DrawAPixel extends JFrame{

public DrawAPixel() {

super("Red Pixel");

setSize(320, 240);

setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

setVisible(true);

}

@Override

public void paint(Graphics g) {

g.setColor(new Color(255, 0, 0));

g.drawRect(100, 100, 1, 1);

}

public static void main(String[] args) {

new DrawAPixel();

}

}

</lang>

Advanced Implementation via subclass of JPanel (more powerful especially while repainting):

<lang Java>import java.awt.Color;

import java.awt.Graphics;

import java.awt.image.BufferedImage;

import javax.swing.JFrame;

import javax.swing.JPanel;

public class DrawAPixel extends JPanel{

private BufferedImage puffer;

private JFrame window;

private Graphics g;

public DrawAPixel() {

window = new JFrame("Red Pixel");

window.setSize(320, 240);

window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

window.setLayout(null);

setBounds(0, 0, 320, 240);

window.add(this);

window.setVisible(true);

}

@Override

public void paint(Graphics gr) {

if(g == null) {

puffer = (BufferedImage) createImage(getWidth(), getHeight());

g = puffer.getGraphics();

}

g.setColor(new Color(255, 0, 0));

g.drawRect(100, 100, 1, 1);

gr.drawImage(puffer, 0, 0, this);

}

public static void main(String[] args) {

new DrawAPixel();

}

}

</lang>