Thanks for your reply, Jason - it certainly put me on the right track. I'm still having some trouble trying to encode the Image as a JPEG.
It seems that the JPEGImageEncoder.encode() will only accept BufferedImage objects and that the Toolkit.getDefaultToolkit().getImage() only returns Image objects. I expected to be able to cast the Image to a BufferedImage but that causes the servlet to throw an exception. The only way, I've been able to deal with the situation is to create a new BufferedImage the same size as the original image and then draw the original image into that and encode it. Surely there must be a better way! Can you help me out again? Thanks! -- john Jason Hunter wrote: > Hmm, I thought I talked about this in the book. If you want to send > images you have to send them in an encoded form (GIF, JPEG, TIFF, PNG, > etc). So in your case, either your servlet has to retrieve just the > image bytes from the other server and pass them on to the client > (keeping them encoded), or if you servlet has to get the image as a > java.awt.Image object then it has to encode it before sending it to the > client. > > Glad you liked the book. :-) > > -jh- > > John C Cartwright wrote: > >>Hello All, >> >>I'm trying to build a simple servlet that will provide images to an >>applet. Essentially trying to get around the applet's limitation of >>only reading files from it's host. >> >>I started with the example in Chapter of Jason Hunter's "Java Servlet >>Programming" (excellent book, by the way!). The servlet reads an image >>from a URL into an java.awt.image object. The applet then retrieves >>that object from the servlet using com.oreilly.servlet.HttpMessage class. >> >>The applet is throwing a java.io.FileNotFoundException, but experiments >>lead me to believe that the problem is due to the fact that the >>java.awt.Image class does not implement serializable interface. >>The servlet can correctly determine the width and height of the image >>and successfully transfer that information to the applet as a String object. >> >>So, is there a better way to achieve my objective than to transfer an >>java.awt.Image object from the servlet to the applet? Does the object >>being transferred have to be serializable? >> >>Thanks for your help! >> >>-- john >> >>-- >>===================================================== >>John Cartwright >>Professional Research Assistant / Associate Scientist >>CIRES, SEG/NGDC/NOAA >>(303) 497-6284 >>[EMAIL PROTECTED] >>===================================================== >> >>___________________________________________________________________________ >>To unsubscribe, send email to [EMAIL PROTECTED] and include in the body >>of the message "signoff SERVLET-INTEREST". >> >>Archives: http://archives.java.sun.com/archives/servlet-interest.html >>Resources: http://java.sun.com/products/servlet/external-resources.html >>LISTSERV Help: http://www.lsoft.com/manuals/user/user.html >> > > ___________________________________________________________________________ > To unsubscribe, send email to [EMAIL PROTECTED] and include in the body > of the message "signoff SERVLET-INTEREST". > > Archives: http://archives.java.sun.com/archives/servlet-interest.html > Resources: http://java.sun.com/products/servlet/external-resources.html > LISTSERV Help: http://www.lsoft.com/manuals/user/user.html > > > -- ===================================================== John Cartwright Professional Research Assistant / Associate Scientist CIRES, SEG/NGDC/NOAA (303) 497-6284 [EMAIL PROTECTED] ===================================================== ___________________________________________________________________________ To unsubscribe, send email to [EMAIL PROTECTED] and include in the body of the message "signoff SERVLET-INTEREST". Archives: http://archives.java.sun.com/archives/servlet-interest.html Resources: http://java.sun.com/products/servlet/external-resources.html LISTSERV Help: http://www.lsoft.com/manuals/user/user.html
