I tried to draw some image in offscreen image. Wait until image is finished drawing. And draw offscreen image on frame. I make the code below. But when I run, I see black screen. What's wrong with the code below ?

			

			import java.awt.*;
			

			import java.awt.image.*;
			

			

			public class Test{
			

			

			static java.awt.Image img;
			

			static boolean done = false;
			

			

			public static void main (String[] args){
			

			img = java.awt.Toolkit.getDefaultToolkit().getImage ("test.gif");
			

			final BufferedImage b = new BufferedImage(400, 400, BufferedImage.TYPE_INT_RGB);
			

			final Graphics g = b.getGraphics();
			

			ImageObserver o = new ImageObserver (){
			

			public boolean imageUpdate (Image img, int infoflags, int x, int y, int w, int h){
			

			if ((infoflags & (ERROR|ABORT|ALLBITS|FRAMEBITS)) != 0){
			

			return !(done = true);
			

			}
			

			g.drawImage (Test.img, 0, 0, this);
			

			return !(done = false);
			

			}
			

			};
			

			g.drawImage(img, 0, 0, o);
			

			try{
			

			while (!done) Thread.sleep (100);
			

			}catch (Throwable e){}
			

			final Frame f = new Frame(){
			

			public void paint (Graphics g){
			

			g.drawImage (b, 0, 0, this);
			

			}
			

			};
			

			f.setSize (100, 100);
			

			f.setVisible (true);
			

			}
			

			}