The java.util.* and java.io.* classes are automatically included, so no specific jar file needed there. For javax.servlet.jsp.tagext.* and javax.servlet.jsp.* you need jboss_home/server/default/lib/javax.servlet.jsp.jar. To compile, form the same directory as the file, enter: java -cp jboss_home/server/default/lib/javax.servlet.jsp.jar yourfile.java where jboss_home is the location where you installed JBoss and yourfile.java is the filename of the class you are compiling. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3979706#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...