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Javax.servlet.servletexception Error Performing Conversion Of Value

messages development-7 Reply | Threaded Open this post in threaded view ♦ ♦ | Report Content as Inappropriate ♦ ♦ DataTable in JSF javax.servlet.ServletException Dear all, I want to develop a system using JSF, I've never used JSF before, and now I faced a problem about DataTable, would somebody can help me? This is the error message: HTTP Status 500 - -------------------------------------------------------------------------------- type Exception report message description The server encountered an internal error () that prevented it from fulfilling this request. exception javax.servlet.ServletException: Error performing conversion of value ' of type class java.lang.String to type interface java.util.List for managed bean lucky. root cause javax.faces.FacesException: Error performing conversion of value ' of type class java.lang.String to type interface java.util.List for managed bean lucky. note The full stack traces of the exception and its root causes are available in the Sun Java System Application Server Platform Edition 9.0_01 logs. -------------------------------------------------------------------------------- Sun Java System Application Server Platform Edition 9.0_01 Firstly, I define two java beans, here are the codes, please note that I just hardcode the data in the bean initially to see if the datatable work or not: LuckyDraw.java package com.popsmacau.entities; public class LuckyDraw { private int id; private String originalNumber; private String encodedNumber; private String securityNumber; public LuckyDraw(){ this.originalNumber = new String(""); this.encodedNumber = new String(""); this.securityNumber = new String(""); } public LuckyDraw(int id, String original, String encode, String security){ this.id = id; this.originalNumber = original; this.encodedNumber = encode; this.securityNumber = security; } public void setOriginalNumber(String number){ this.originalNumber = new String(number); } public void setEncodedNumber(String number){ this.encodedNumber = new String(number); } public void setSecurityNumber(String number){ this.securityNumber = n

not work correctly without it enabled. Please turn JavaScript back on and reload this page. All Places > RichFaces > RichFaces Development > Discussions Please enter a title. You can not post a blank message. Please type your message and try again. 4 Replies Latest reply on Jan 30, 2008 8:33 AM by Ilya Shaikovsky Tomcat6 http://netbeans-org.1045718.n5.nabble.com/DataTable-in-JSF-javax-servlet-ServletException-td3014170.html migration problem Jim Vincent Jan 24, 2008 4:26 AM I have tried to change from myFace to sun JSF.I have migrated on jdk1.5 and tomcat 6.I have a datatable with input fields.I have set ajax fields with https://developer.jboss.org/thread/5284 keypress events.For example, when the dimension field is changed, the price must change.Here is my code: Â Here is the class public class HtmlInputNumericTextComponent { HtmlInputText valueRef; public HtmlInputText getValueRef() { return valueRef; } public void setValueRe

here for a quick overview of the site Help Center Detailed answers to any questions you might http://stackoverflow.com/questions/23493164/java-lang-numberformatexception-null-i have Meta Discuss the workings and policies of this site About https://tomcat.apache.org/tomcat-5.5-doc/jasper/docs/api/org/apache/jasper/runtime/JspRuntimeLibrary.html Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the Stack Overflow Community Stack Overflow is a community of 4.7 million javax.servlet.servletexception error programmers, just like you, helping each other. Join them; it only takes a minute: Sign up java.lang.NumberFormatException: null i up vote -1 down vote favorite Here i come up with problem while performing some operation like update,delete and insert but its return some null value with exception kindly some one could look at the code javax.servlet.servletexception error performing if its wrong: Error: HTTP Status 500 - null type Exception report message null description The server encountered an internal error that prevented it from fulfilling this request. exception java.lang.NumberFormatException: null java.lang.Integer.parseInt(Integer.java:454) java.lang.Integer.parseInt(Integer.java:527) Controller.ControllerTest.doGet(ControllerTest.java:48) javax.servlet.http.HttpServlet.service(HttpServlet.java:617) javax.servlet.http.HttpServlet.service(HttpServlet.java:723) note The full stack trace of the root cause is available in the Apache Tomcat/6.0.37 logs. Apache Tomcat/6.0.37 user.jsp:

<% for(int i = 0; i < users.size(); i+=1) { UseBean user = (UseBean)users.get(i); %> id:
Name:
Password:
phoneno:
Emailid:
<%} %> listuser.jsp <% for(int i = 0; i < users.size(); i+=1) { UseBean user = (UseBean)users.get(i); %> <

public class JspRuntimeLibraryextends java.lang.Object Bunch of util methods that are used by code generated for useBean, getProperty and setProperty. The __begin, __end stuff is there so that the JSP engine can actually parse this file and inline them if people don't want runtime dependencies on this class. However, I'm not sure if that works so well right now. It got forgotten at some point. -akv Author: Mandar Raje, Shawn Bayern Nested Class Summary protected staticclass JspRuntimeLibrary.PrivilegedIntrospectHelper Constructor Summary JspRuntimeLibrary() Method Summary staticjava.lang.Object coerce(java.lang.Strings, java.lang.Classtarget) staticboolean coerceToBoolean(java.lang.Strings) staticbyte coerceToByte(java.lang.Strings) staticchar coerceToChar(java.lang.Strings) staticdouble coerceToDouble(java.lang.Strings) staticfloat coerceToFloat(java.lang.Strings) staticint coerceToInt(java.lang.Strings) staticlong coerceToLong(java.lang.Strings) staticshort

 

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Id Name password phoneno emailid Action
<%= user.getID() %> <%= user.getName() %> <%= user.getPassword() %>