app engine req.getParameter with type float

[zokuero]

I'm trying to do something very similar to the Guestbook which is in the App Engine tutorial (get started). However, I want to modified the types of the fields in the form. Eclipse doesn't show any error, but the server says:\[code\]Problem accessing /. Reason: java.lang.NoSuchMethodError: prototipo2.Greeting.getDistance()Ljava/lang/Float;Caused by: javax.servlet.ServletException: java.lang.NoSuchMethodError: prototipo2.Greeting.getDistance() Ljava/lang/Float; at org.apache.jasper.runtime.PageContextImpl.doHandle PageException(PageContextImpl.java:862) at org.apache.jasper.runtime.PageContextImpl.handlePa geException(PageContextImpl.java:791) at org.apache.jsp.prototipo2_jsp._jspService(prototip o2_jsp.java:326) at org.apache.jasper.runtime.HttpJspBase.service(Http JspBase.java:97) at javax.servlet.http.HttpServlet.service(HttpServlet .java:717) at org.apache.jasper.servlet.JspServletWrapper.servic e(JspServletWrapper.java:377) at org.apache.jasper.servlet.JspServlet.serviceJspFil e(JspServlet.java:313) at org.apache.jasper.servlet.JspServlet.service(JspSe rvlet.java:260) at com.google.appengine.tools.development.PrivilegedJ spServlet.access$101 (PrivilegedJspServlet.java:23) at com.google.appengine.tools.development.PrivilegedJ spServlet$2.run(PrivilegedJspServlet.java:59) at java.security.AccessController.doPrivileged(Native Method) at com.google.appengine.tools.development.PrivilegedJ spServlet.service(PrivilegedJspServlet.java:57) at javax.servlet.http.HttpServlet.service(HttpServlet .java:717) at org.mortbay.jetty.servlet.ServletHolder.handle(Ser vletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1166) at com.google.appengine.tools.development.BackendServ ersFilter.doFilter(BackendServersFilter.java:97) at org.mortbay.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle(Se rvletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle( SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(Se ssionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(Co ntextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebA ppContext.java:418) at com.google.appengine.tools.development.DevAppEngin eWebAppContext.handle(DevAppEngineWebAppContext.ja va:78) at org.mortbay.jetty.servlet.Dispatcher.forward(Dispa tcher.java:327) at org.mortbay.jetty.servlet.Dispatcher.forward(Dispa tcher.java:126) at com.google.appengine.tools.development.StaticFileU tils.serveWelcomeFileAsForward(StaticFileUtils.jav a:80) at com.google.appengine.tools.development.LocalResour ceFileServlet.maybeServeWelcomeFile(LocalResourceF ileServlet.java:254) at com.google.appengine.tools.development.LocalResour ceFileServlet.doGet(LocalResourceFileServlet.java: 120) at javax.servlet.http.HttpServlet.service(HttpServlet .java:617) at javax.servlet.http.HttpServlet.service(HttpServlet .java:717) at org.mortbay.jetty.servlet.ServletHolder.handle(Ser vletHolder.java:511) at org.mortbay.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1166) at com.google.appengine.tools.development.HeaderVerif icationFilter.doFilter(HeaderVerificationFilter.ja va:35) at org.mortbay.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1157) at com.google.appengine.api.blobstore.dev.ServeBlobFi lter.doFilter(ServeBlobFilter.java:60) at org.mortbay.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1157) at com.google.apphosting.utils.servlet.TransactionCle anupFilter.doFilter(TransactionCleanupFilter.java: 43) at org.mortbay.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development.StaticFileF ilter.doFilter(StaticFileFilter.java:122) at org.mortbay.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1157) at com.google.appengine.tools.development.BackendServ ersFilter.doFilter(BackendServersFilter.java:97) at org.mortbay.jetty.servlet.ServletHandler$CachedCha in.doFilter(ServletHandler.java:1157) at org.mortbay.jetty.servlet.ServletHandler.handle(Se rvletHandler.java:388) at org.mortbay.jetty.security.SecurityHandler.handle( SecurityHandler.java:216) at org.mortbay.jetty.servlet.SessionHandler.handle(Se ssionHandler.java:182) at org.mortbay.jetty.handler.ContextHandler.handle(Co ntextHandler.java:765) at org.mortbay.jetty.webapp.WebAppContext.handle(WebA ppContext.java:418) at com.google.appengine.tools.development.DevAppEngin eWebAppContext.handle(DevAppEngineWebAppContext.ja va:78) at org.mortbay.jetty.handler.HandlerWrapper.handle(Ha ndlerWrapper.java:152) at com.google.appengine.tools.development.JettyContai nerService$ApiProxyHandler.handle(JettyContainerSe rvice.java:363) at org.mortbay.jetty.handler.HandlerWrapper.handle(Ha ndlerWrapper.java:152) at org.mortbay.jetty.Server.handle(Server.java:326) at org.mortbay.jetty.HttpConnection.handleRequest(Htt pConnection.java:542) at org.mortbay.jetty.HttpConnection$RequestHandler.he aderComplete(HttpConnection.java:923) at org.mortbay.jetty.HttpParser.parseNext(HttpParser. java:547) at org.mortbay.jetty.HttpParser.parseAvailable(HttpPa rser.java:212) at org.mortbay.jetty.HttpConnection.handle(HttpConnec tion.java:404) at org.mortbay.io.nio.SelectChannelEndPoint.run(Selec tChannelEndPoint.java:409) at org.mortbay.thread.QueuedThreadPool$PoolThread.run (QueuedThreadPool.java:582) Caused by: java.lang.NoSuchMethodError: prototipo2.Greeting.getDistance()Ljava/lang/Float; at org.apache.jsp.prototipo2_jsp._jspService(prototip o2_jsp.java:187) ... 56 more\[/code\]My code is:\[code\]@Persistent private Float distance;public Greeting (User author, String content, Date date, String distance) { this.author = author; this.content = content; this.date = date; this.distance = Float.parseFloat(distance); } }public Float getDistance() {return distance; }\[/code\]And Eclipse says everything is ok when I run the app, but when I open the file in my localhost domain, I see the error that I wrote you before.However, if I change the code in something like this:\[code\]@Persistent private String distance;public Greeting (User author, String content, Date date, String distance) { this.author = author; this.content = content; this.date = date; this.distance = distance;}public String getDistance() {return distance; }\[/code\]Thank you!