Hi Pandian,
You can keep your jar file in classpath sothat the
servlet engine can search it or you can keep it where your application keeps all your servlets class files. Like "servlet.jar" you can include your "*.jar" file in classpath in autoexec.bat file.
for example say your bean class is in "bean.jar" which is in d:\beanjars dir then
set classpath=%classpath%;d:\beanjars\bean.jar
Then your JSP engine will search bean.jar also(apart from other classpaths mentioned) for your class file which you are using in <jsp:useBean ........class="..." />
solaiappan