Java tutorial
import java.awt.Color; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.awt.image.RenderedImage; import java.io.File; import javax.imageio.ImageIO; public class Main { public static void main(String[] argv) throws Exception { int width = 100; int height = 100; BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB); Graphics2D g2d = bufferedImage.createGraphics(); g2d.setColor(Color.white); g2d.fillRect(0, 0, width, height); g2d.setColor(Color.black); g2d.fillOval(0, 0, width, height); g2d.dispose(); RenderedImage rendImage = bufferedImage; File file = new File("newimage.png"); ImageIO.write(rendImage, "png", file); file = new File("newimage.jpg"); ImageIO.write(rendImage, "jpg", file); } }