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Questions tagged [classnotfoundexception]

The Java exception thrown when an application tries to load a class by name but is not able to find the class.

The Java exception thrown when an application tries to load a class by name. Usually raised by one of:

  • the forName(String) method in class Class
  • the findSystemClass(String) method in class ClassLoader
  • the loadClass(String) method in class ClassLoader

when no definition for the class with the specified name could be found in the .

Don't confuse it with , it's a different kind of error, see the following links for more details:

2104 questions
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What causes and what are the differences between NoClassDefFoundError and ClassNotFoundException?

What is the difference between NoClassDefFoundError and ClassNotFoundException? What causes them to be thrown? How can they be resolved? I often encounter these throwables when modifying existing code to include new jar files. I have hit them on…
krisp
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java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener

I included these in the Build Path: all Spring libs Apache Tomcat 7.0 library The project still fails during startup: SEVERE: Error configuring application listener of class…
emeraldhieu
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Why, Fatal error: Class 'PHPUnit_Framework_TestCase' not found in ...?

Why I'm getting this PHP error? Fatal error: Class 'PHPUnit_Framework_TestCase' not found in ...
Alvin
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How do I resolve ClassNotFoundException?

I am trying to run a Java application, but getting this error: java.lang.ClassNotFoundException: After the colon comes the location of the class that is missing. However, I know that that location does not exist since the class is located…
user2426316
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Android Activity ClassNotFoundException - tried everything

I've just refactored an app into a framework library and an application, but now when I try and start the app in the emulator I get the following error stack trace: 06-02 18:22:35.529: E/AndroidRuntime(586): FATAL EXCEPTION: main 06-02 18:22:35.529:…
Matthew Rathbone
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Android E/Parcel﹕ Class not found when unmarshalling (only on Samsung Tab3)

I've been unable to resolve why this error occurs, and only on a Samsung Tab3 device, running 4.4.2? It happens when my MainActivity starts another Activity, and passes a Parcelable class in the intent like so: private void…
J Avery
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JUNIT Test class in Eclipse - java.lang.ClassNotFoundException

I'm trying to run my junit test (to verify that a properties file loads correctly) but I get ClassNotFoundException although the class is there and all required libraries are there too. Here it is the error I get : Class not found…
Mouna Cheikhna
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java.lang.ClassNotFoundException on working app

I have created and published my first Android app. It's very simple. It works fine on simulator and some phones, but I am getting this error: java.lang.RuntimeException: Unable to instantiate application cz.teamnovak.droid.Novak ESC Track guide:…
Skoky
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org.glassfish.jersey.servlet.ServletContainer ClassNotFoundException

I have been getting a ClassNotFoundException with org.glassfish.jersey.servlet.ServletContainer but it peculiarly started last night when I tried to start/re-start my Tomcat server (v7) with Eclipse Juno. Not sure what is going on. What's bizarre…
ssankara73
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java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.core.Config

When I am run my application after entering the URL, this exception is coming.I am using Eclipse and Tomcat7.0.35. I also added Jstl.jar and jstl1.2.jar My code is java.lang.ClassNotFoundException: javax.servlet.jsp.jstl.core.Config at…
Ssv
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Android ClassNotFoundException: Didn't find class on path

I can't find the solution of this error. Can you please give the permanent solution? I have no idea how to solve it. 01-04 11:06:42.302: E/AndroidRuntime(1906): java.lang.RuntimeException: Unable to instantiate activity…
user3129072
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Java ClassNotFoundException with maven dependency

I am getting ClassNotFoundException and NoClassDefFoundError exceptions when I attempt to run my application using a maven defined dependency. I added my maven dependency for the jar in question to my pom.xml file with the following…
Vex
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ClassNotFoundException when using User Libraries in Eclipse build path

I'm using Eclipse 3.7 (STS) with Tomcat 7 running inside the IDE. I've created a new Dynamic Web project and added a single JSP file to the web content root folder. I can run Tomcat and access the JSP from within Eclipse with no problems. I've added…
user646584
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How to use clojure doc function?

I'm just starting with Clojure and can't access to the doc function. I'm using clojure 1.3 with emacs24 and swank-clojure. user> *clojure-version* {:major 1, :minor 3, :incremental 0, :qualifier nil} But when I try: (doc doc) I get: Unable to…
zaforas
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Resolving dependency problems in Apache Spark

The common problems when building and deploying Spark applications are: java.lang.ClassNotFoundException. object x is not a member of package y compilation errors. java.lang.NoSuchMethodError How these can be resolved?
user7337271
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