java.lang.NullPointerException at calendar.Register.processRequest(Register.java:56) at calendar.Register.doGet(Register.java:144) at javax.servlet.http.HttpServlet.service(HttpServlet.java:114) at javax.servlet.http.HttpServlet.service(HttpServlet.java:91) at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:103) at calendar.UtfFilter.doFilter(UtfFilter.java:40) at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:87) at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:187) at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:265) at com.caucho.server.hmux.HmuxRequest.handleRequest(HmuxRequest.java:436) at com.caucho.server.port.TcpConnection.run(TcpConnection.java:682) at com.caucho.util.ThreadPool$Item.runTasks(ThreadPool.java:730) at com.caucho.util.ThreadPool$Item.run(ThreadPool.java:649) at java.lang.Thread.run(Thread.java:619)