illegalargumentexception

问题 <servlet> <servlet-name>myservlet</servlet-name> <servlet-class>workflow.WDispatcher</servlet-class> <load-on-startup>2</load-on-startup> </servlet> <servlet-mapping> <servlet-name>myservlet</servlet-name> <url-pattern>*NEXTEVENT*</url-pattern> </servlet-mapping> Above is the snippet from Tomcat\'s web.xml . The URL pattern *NEXTEVENT* on start up throws java.lang.IllegalArgumentException: Invalid <url-pattern> in servlet mapping It will be greatly appreciated if someone can hint at the error

问题 I have a fragment I am trying to add into a view. FragmentManager fragMgr=getSupportFragmentManager(); feed_parser_activity content = (feed_parser_activity)fragMgr .findFragmentById(R.id.feedContentContainer); FragmentTransaction xaction=fragMgr.beginTransaction(); if (content == null || content.isRemoving()) { content=new feed_parser_activity(item.getLink().toString()); xaction .add(R.id.feedContentContainer, content) .setTransition(FragmentTransaction.TRANSIT_FRAGMENT_OPEN) .addToBackStack

问题 I tried to add this servlet package com.classmgt.servlet; @WebServlet(\"/ControllerServlet\") public class ControllerServlet extends HttpServlet {} to my Eclipse project, by editing the web.xml as below <servlet> <description>Servlet to print out Hello World!</description> <display-name>ControllerServlet</display-name> <servlet-name>ControllerServlet</servlet-name> <servlet-class>com.classmgt.servlet.ControllerServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name

问题 I have an application with three tabs. Each tab has its own layout .xml file. The main.xml has its own map fragment. It\'s the one that shows up when the application first launches. Everything works fine except for when I change between tabs. If I try to switch back to the map fragment tab, I get this error. Switching to and between other tabs works just fine. What could be wrong here? This is my main class and my main.xml, as well as a relevant class that I use ( you will also find the error