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HelloWorldGraphics.javaAPI DocExample1204Thu Apr 05 01:38:40 BST 2001None

HelloWorldGraphics

public class HelloWorldGraphics extends HttpServlet

Fields Summary
Constructors Summary
Methods Summary
public voiddoGet(javax.servlet.http.HttpServletRequest req, javax.servlet.http.HttpServletResponse res)

    ServletOutputStream out = res.getOutputStream();  // binary output!

    Frame frame = null;
    Graphics g = null;

    try {
      // Create an unshown frame
      frame = new Frame();
      frame.addNotify();

      // Get a graphics region, using the Frame
      Image image = frame.createImage(400, 60);
      g = image.getGraphics();

      // Draw "Hello World!" to the off-screen graphics context
      g.setFont(new Font("Serif", Font.ITALIC, 48));
      g.drawString("Hello World!", 10, 50);

      // Encode the off-screen image into a GIF and send it to the client
      res.setContentType("image/gif");
      GifEncoder encoder = new GifEncoder(image, out);
      encoder.encode();
    }
    finally {
      // Clean up resources
      if (g != null) g.dispose();
      if (frame != null) frame.removeNotify();
    }