File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
The moose likes Servlets and the fly likes Jcaptcha doesnt work in java 1.5 Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Java » Servlets
Bookmark "Jcaptcha doesnt work in java 1.5" Watch "Jcaptcha doesnt work in java 1.5" New topic

Jcaptcha doesnt work in java 1.5

Abhi Venu
Ranch Hand

Joined: Jul 09, 2009
Posts: 73

I have added jcaptcha in a jsp page. I compiled the prject using java 6. But when i create a project using java 5.It gives exception doesnt work. Bad version number in .class file

java.lang.UnsupportedClassVersionError: Bad version number in .class file. How this can be fixed.

I revereted bak to another jar it seems and old version now i am getting black and whit captcha.How can this be made into beautiful ones as in new version.

I use following code

// create the image with the text
BufferedImage bi = service.getImageChallengeForID(httpServletRequest.getSession(true).getId());

ServletOutputStream out = httpServletResponse.getOutputStream();


A table, a chair, a bowl of fruit and a violin; what else does a man need to be happy?:Einstein
Ulf Dittmer

Joined: Mar 22, 2005
Posts: 42959
You're using an older JVM to execute the code than you're using to compile it. Code compiled in Java 6 needs at least a Java 6 JVM - you can't run it on a Java 5 JVM.
Abhi Venu
Ranch Hand

Joined: Jul 09, 2009
Posts: 73

Thanks for the reply. My doubt is that how to get this same look and feel of new version jcaptcha even if use java 5
I agree. Here's the link:
subject: Jcaptcha doesnt work in java 1.5
jQuery in Action, 3rd edition