Error Exception In Thread Awt-eventqueue-0 Java.lang.noclassdeffounderror
java.lang.NoClassDefFoundError: How to resolve - Part 2 6/15/2012 Pierre-Hugues Charbonneau 47 comments This article is part 2 of our java.lang.NoClassDefFoundError troubleshooting series. It will focus on the more simple type of NoClassDefFoundError problem. This article is ideal for Java beginners and I highly recommend that you compile, run and study the sample Java program. If not done already, I suggest that you first review thejava.lang.NoClassDefFoundError - Part 1. The following writing format will be used going forward and will provide you with: - Description of the problem case and type of NoClassDefFoundError. - Sample Java program "simulating" the problem case. - ClassLoader chain view. - Recommendations and resolution strategies. NoClassDefFoundError problem case 1 - missing JAR file The first problem case we will cover is related to a Java program packaging and / or classpath problem. A typical Java program can include one or many JAR files created at compile time. NoClassDefFoundError can often be observed when you forget to add JAR file(s) containing Java classes referenced by your Java or Java EE application. This type of problem is normally not hard to resolve once you analyze the Java Exception and missing Java class name. Sample Java program ** Tutorial video is now available:http://www.youtube.com/watch?v=Nn_Pq8cWiBg The following simple Java program is split as per below: - The main Java program NoClassDefFoundErrorSimulator - The caller Java class CallerClassA - The referencing Java class ReferencingClassA - A util class for ClassLoader and logging related facilities JavaEETrainingUtil This program is simple attempting to create a new instance and execute a method of the Java class CallerClassA which is referencing the class ReferencingClassA.It will demonstrate how a simple classpath problem can trigger NoClassDefFoundError. The program is also displaying detail
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 http://javaeesupportpatterns.blogspot.com/2012/06/javalangnoclassdeffounderror-how-to_15.html 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 http://javarevisited.blogspot.com/2011/06/noclassdeffounderror-exception-in.html 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 come if a class was present during compile time but not available in java classpath during runtime.
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Support Answers MathWorks Search MathWorks.com MathWorks Answers Support MATLAB Answers™ MATLAB Central Community Home MATLAB Answers File Exchange Cody Blogs Newsreader Link Exchange ThingSpeak Anniversary Home Ask Answer Browse More Contributors Recent Activity Flagged Content Flagged as Spam Help MATLAB Central Community Home MATLAB Answers File Exchange Cody Blogs Newsreader Link Exchange ThingSpeak Anniversary Home Ask Answer Browse More Contributors Recent Activity Flagged Content Flagged as Spam Help Trial software Martina (view profile) 1 question 0 answers 0 accepted answers Reputation: 0 Vote0 Java error when opening fig files Asked by Martina Martina (view profile) 1 question 0 answers 0 accepted answers Reputation: 0 on 27 Nov 2014 Latest activity Commented on by Horia Muntean Horia Muntean (view profile) 0 questions 0 answers 0 accepted answers Reputation: 0 on 18 Jul 2016 136 views (last 30 days) 136 views (last 30 days) When I try to open a .fig I get this error:Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: Could not initialize class javax.media.opengl.GLProfile at javax.media.opengl.GLCapabilities.