Error Creating Object Java .lang.classnotfoundexception
in Java J2EE I know how frustrating is to see Exception in thread "main" java.lang.NoClassDefFoundError,which is a manifestation of NoClassDefFoundError in Java. I have seen it a couple of times and spent quite a lot time initially to figure out what is wrong, which class is missing etc. The first mistake I did was mingling java.lang.ClassNotfoundException and NoClassDefFoundError, in reality, they are totally different, and my second mistake was using trial and error method to solve this java.lang.NoClassDefFoundError instead of understanding why NoClassDefFoundError is coming, what is the real reason behind NoClassDefFoundError and how to resolve this. In this Java tutorial, I have tried to rectify that mistakes and uncover some secrets of NoClassDefFoundError in Java and will share my experience around it. NoClassDefFoundError is not something which cannot be resolved or hard to resolve it's just its manifestation which puzzles most of Java developer. This is the most common error in Java development along with java.lang.OutOfMemoroyError: Java heap space and java.lang.OutOfMemoryError: PermGen space Anyway lets's see Why NoClassDefFoundError comes in Java and what to do to resolve NoClassDefFoundError in Java. What is the reason of NoClassDefFoundError in Java? NoClassDefFoundError in Java comes when Java Virtual Machine is not able to find a particular class at runtime which was available at compile time. For example, if we have a method call from a class or accessing any static member of a Class and that class is not available during run-time then JVM will throw NoClassDefFoundError. It's important to understand that this is different than ClassNotFoundException which comes while trying to load a class at run-time only and the name was provided during runtime, not at compile-time. Many Java developer mingles this two Error and gets confused. In short, NoClassDefFoundError will c
here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about Stack Overflow the company Business Learn more about hiring developers or posting ads with us http://javarevisited.blogspot.com/2011/06/noclassdeffounderror-exception-in.html 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 programmers, just like you, helping each other. Join them; it only takes a minute: Sign up Failed to http://stackoverflow.com/questions/24592196/failed-to-create-sessionfactory-object-java-lang-noclassdeffounderror-org-hiber create sessionFactory object.java.lang.NoClassDefFoundError: org/hibernate/cfg/Configuration up vote 0 down vote favorite I've got this exception right now: Failed to create sessionFactory object.java.lang.NoClassDefFoundError: org/hibernate/cfg/Configuration I'm working with Idea 12 hibernate.cfg.xml (inside my main package) :
Guides Zones | Agile Big Data Cloud Database DevOps Integration IoT Java Mobile Performance Web Dev Let's be friends: How to Resolve https://dzone.com/articles/how-resolve-2 java.lang.ClassNotFoundException by Pierre - Hugues Charbonneau · Nov. 23, 12 https://bukkit.org/threads/java-lang-noclassdeffounderror-java-lang-object.70450/ · Java Zone Like (1) Comment (0) Save Tweet {{ articles[0].views | formatCount}} Views Edit Delete {{ articles[0].isLocked ? 'Enable' : 'Disable' }} comments {{ articles[0].isLimited ? 'Remove comment limits' : 'Enable moderated comments' }} Join the DZone community error creating and get the full member experience. Join For Free Navigate the Maze of the End-User Experience and pick up this APM Essential guide, brought to you in partnership with CA Technologies. This article is intended for Java beginners currently facing java.lang.ClassNotFoundException challenges. It will provide you with an overview of this common error creating object Java exception, a sample Java program to support your learning process and resolution strategies. If you are interested on more advanced class loader related problems, I recommended that you review my article series on java.lang.NoClassDefFoundErrorsince these Java exceptions are closely related.java.lang.ClassNotFoundException: Overview As per the Oracle documentation, ClassNotFoundExceptionis thrown following the failure of a class loading call, using its string name, as per below:The Class.forName methodThe ClassLoader.findSystemClass methodThe ClassLoader.loadClass method In other words, it means that one particular Java class was not found or could not be loaded at “runtime” from your application current context class loader. This problem can be particularly confusing for Java beginners. This is why I always recommend to Java developers to learn and refine their knowledge on Java class loaders. Unless you are involved in dynamic class loading and using the Java Reflection API, chances are that the ClassNotFoundException error you are getting is not from y
God Hi, Just today, I updated my Java to the latest version. But when I tried to start up my home-run server, this is EVERYTHING I see in cmd: Code: Error occurred during initialization of VM java/lang/NoClassDefFoundError: java/lang/Object Press any key to continue . . . I have attempted to use the system restore to rollback my computer, but the error remained the same. I'm sure that this is a result of me updating Java (Recommended Version 6 Update 31) for 64 bit My Computer's Specs OS - Windows 7 64-bit Architecture and version for Java - Supposedly Version 6 Update 31, however, when I enter java - version, I recieve the SAME error as above. Wrappers - None CraftBukkit Vers - 1.2.5-R1.0 I appreciate how people on bukkit help each other for nothing in return. ~Thanks in advanced Ace Aced God, 13, 2012 #1 Offline andrewpo My BukkitDev ProfileMy Plugins (1) Post your start script please. Wrap it in [ code ] tags. andrewpo, 13, 2012 #2 Offline Aced God andrewpo said: ↑ Post your start script please. Wrap it in [ code ] tags.Click to expand... What exactly is my start script? I apologize for not knowing what one is. I have been on Bukkit for no longer than 2 weeks. If you mean want is shown when I click the .bat for starting up my server what I have posted is all I've seen. Nothing else. Aced God, 13, 2012 #3 Offline andrewpo My BukkitDev ProfileMy Plugins (1) Do you have a "start.bat" or "run.bat" or "start.command" or "start.sh" file (or similar) that you run to get bukkit to start? andrewpo, 13, 2012 #4 Offline Aced God Oh, I see, here it is: Code: @ECHO OFF SET BINDIR=%~dp0 CD /D "%BINDIR%" "%ProgramFiles%\Java\jre6\bin\java.exe" -Xmx3072M -Xms1024M -jar craftbukkit-1.2.5-R1.0.jar PAUSE Aced God, 13, 2012 #5 Offline andrewpo My BukkitDev ProfileMy Plugins (1) Try taking the ' .jar ' off the end of the fourth line. andrewpo, 13, 2012 #6 Offline Aced God Code: Unable to access jarfile craftbukkit-1.2.5-R1.0 Press any key to continue . . . This is what I get in CMD. andrewpo said: ↑ Try taking the ' .jar ' off the end of the fourth line.Click to expand... How could updating my java affect this? EDIT by Moderator: merged posts, please use the edit button instead of double posting. Last edited by a moderator: 25, 2016 Aced God, 13, 2012 #7 Offline andrewpo My BukkitDev ProfileMy Plugins (1) I never said to update your java, the version you have should work fine. Delete your craftbukkit-1.2.3-R1.0.jar file Download this file - http://dl.bukkit.org/latest-rb/craftbukkit.jar Replace