Java tutorial
import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.io.File; import java.util.Iterator; import javax.imageio.ImageIO; import javax.imageio.ImageWriter; import javax.imageio.stream.ImageOutputStream; public class Main { static public void main(String args[]) throws Exception { int width = 200, height = 200; BufferedImage bi = new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB); Graphics2D ig2 = bi.createGraphics(); ig2.fillRect(0, 0, width - 1, height - 1); Iterator imageWriters = ImageIO.getImageWritersByFormatName("GIF"); ImageWriter imageWriter = (ImageWriter) imageWriters.next(); File file = new File("filename.gif"); ImageOutputStream ios = ImageIO.createImageOutputStream(file); imageWriter.setOutput(ios); imageWriter.write(bi); } }