java.lang.NoSuchMethodError: com.jhlabs.image.RippleFilter.setXAmplitude(F)V about kaptcha HOT 9 CLOSED

This is an easy one that one day will make a great interview question to see 
how well someone can problem 
solve java issues.

The answer is that jcaptcha already has com.jhlabs.image.* on the classpath and 
that version is a different 
version than the one that Kaptcha expects. Kaptcha expects the latest version 
and jcaptcha is using a much 
older version (according to the jcaptcha pom.xml, it is 
<version>01012005</version>). For convenience, 
Kaptcha includes the latest version of that library in its .jar file for you.

Because both products require different versions of that package, I don't think 
you are going to be able to use  
both jcaptcha and kaptcha concurrently in the same web application. So, just 
dump jcaptcha. =)

I had the same problem! Thanks for the information now its working!!!!

Hi, I still got this problem although I think I do not have jcaptcha installed. 
can
someone help?

It has nothing to do with jcaptcha, it has to do with having com.jhlabs.image.* 
in your classpath.

Issue 42 has been merged into this issue.

the same happens when you have SimpleCaptcha also installed. 

patient: it hurts when i do that.
dr: don't do that.

[deleted comment]

I had the problem.
And finally I found it's the jar conflict.
Because there is a jcaptcha-all.jar in the lib.