Hi i am getting this error please help me out, thanks
java.lang.NoClassDefFoundError: com/ge/energy/wp/core/exception/WPException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class`enter code here`.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.getMethod0(Unknown Source)
at java.lang.Class.getMethod(Unknown Source)
at org.junit.internal.requests.ClassRequest.hasSuiteMethod(ClassRequest.java:62)
at org.junit.internal.requests.ClassRequest.getRunnerClass(ClassRequest.java:50)
at org.junit.internal.requests.ClassRequest.getRunner(ClassRequest.java:28)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.<init>(JUnit4TestReference.java:28)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestClassReference.<init>(JUnit4TestClassReference.java:24)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.createTest(JUnit4TestLoader.java:40)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestLoader.loadTests(JUnit4TestLoader.java:30)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:445)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
Caused by: java.lang.ClassNotFoundException: com.ge.energy.wp.core.exception.WPException
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClassInternal(Unknown Source)
... 15 more
try adding source folder to your classpath. If you use eclipse, right click test file and select Run configuration under Junit test and select classpath and add your source folders to class path.
Check class WPException. Usually your IDE should show you if something is wrong with the java file but not with the class file - either it wasn't compiled or missing (the error is triggered when the JVM can't find the class) for some other reason, one of them could be, like bluelabel mentioned, a problem with the PATH.
I know this is old post...but may help someone else...
whenever I have faced this issue only problem have been the java version eclipse is defaulted to - which is the eclipse jre.
Fix - change to the proper jre installed on your machine !
Related
While setting up a JUNIT class for a uni project I keep getting the following error (working in Eclipse Oxygen):
Class not found UnitTest
java.lang.ClassNotFoundException: UnitTest
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.loadClass(RemoteTestRunner.java:688)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.loadClasses(RemoteTestRunner.java:421)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:444)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
Cant really figure out whats going on, already tried a few question-related answers like clean up the project and checking that the test is running from my project/bin folder.
I was messing with the JRE setup on Eclipse. Originally the project was set to 1.6 and when set to 1.7, my program started showing a lot of errors. So when i switched back to 1.6, all the compile time errors vanished but i have a new problem now.
This was shown on the console when i tried to run the started class containing the main function. The .class files all exist. Please advice.
java.lang.UnsupportedClassVersionError: Demo : Unsupported major.minor version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
Exception in thread "main"
Version 51.0 means the are still class files compiled with Java 7. This files wont run with a JRE 6. You have to recompile them first (Rebuild project or clean compile using ant/maven).
Check if java versions match in your Java Build path and Java Compiler in Project properties. I think you compiled with 1.6 and is trying to run with java 1.7
I have tried running the demo msgsend from JavaMail. I have downloaded version 1.4.5 of JavaMail and unpacked it into my JDK folder. I have added mail.jar to CLASSPATH. I have compiled msgsend.java without getting any error back. However, when I then try running java msgsend I get an "Could not find the main class: msgsend" error.
I am a total noob in Java world and have spend hours browsing through the Internet trying to find an answer but to no avail in my case.
Here is what I get in the console. What am I doing wrong?
C:\Program Files\Java\jdk1.6.0_34\javamail-1.4.5\demo>echo %CLASSPATH%
C:\Program Files\Java\jdk1.6.0_34\javamail-1.4.5\mail.jar
C:\Program Files\Java\jdk1.6.0_34\javamail-1.4.5\demo>javac -cp "%classpath%" ms
gsend.java
C:\Program Files\Java\jdk1.6.0_34\javamail-1.4.5\demo>java msgsend
Exception in thread "main" java.lang.NoClassDefFoundError: msgsend
Caused by: java.lang.ClassNotFoundException: msgsend
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: msgsend. Program will exit.
C:\Program Files\Java\jdk1.6.0_34\javamail-1.4.5\demo>java -cp "%classpath%" msg
send
Exception in thread "main" java.lang.NoClassDefFoundError: msgsend
Caused by: java.lang.ClassNotFoundException: msgsend
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: msgsend. Program will exit.
C:\Program Files\Java\jdk1.6.0_34\javamail-1.4.5\demo>
Classes are case sensitive. Be sure you have the compiled MsgSend in your class path, and invoke the compiled class with the proper case.
Try java MsgSend
Edited:
This is how it will work:
Compile as you were doing:
javac.exe -cp ..\mail.jar msgsend.java
And then to run the compiled class do:
java -cp ..\mail.jar;. msgsend
In other words: you were missing the current folder in your classpath.
You didn't include the directory where msgsend.class exists, usually the current directory ("."). See the examples in README.txt included with JavaMail.
I need help, I followed the following tutorial on setting up my project.
http://lwjgl.org/wiki/index.php?title=Setting_Up_LWJGL_with_NetBeans
And I added the following run command
-Djava.library.path='C:\Program Files (x86)\Java\lwjgl-2.8.3\native\windows'
And my project wors great in netbeans, however I can't distribute my application as I double click the jar I recieve a noClassDefFound exception.
My dist folder contains the following 2 files, no natives.
/dist/Engine.jar /dist/lib/lwjgl.jar
I am sure this is due to my natives not being included in my dist folder, I have tried searching the net and I have yet to find a solution that works, Please any help you can give me would be great, thanks.
I found a solution to my issue, I thought I would share it with others, as a lot of people seemed to have suffered like myself.
I was receiving the following exception on run,
Exception in thread "main" java.lang.NoClassDefFoundError: engine2D/engine/Engin
e
at Engine2D.Game.<init>(Game.java:42)
at Engine2D.Game.main(Game.java:48)
Caused by: java.lang.ClassNotFoundException: engine2D.engine.Engine
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 2 more
This was due to case-sensitivity which was ignored by netbeans, so whenever
engine2d.engine.Engine
was invoked it referenced the following.
Engine2D.engine.Engine
But when ran locally, I hope this helps others and I can get back to working on my game.
Thanks Gary
Today I programmed myself a Little game, which I compiled into a jar through Eclipse - I made sure its a executable jar, or runnable jar or however you want to call it.
I've sent the jar to a friend of mine, but oddly he's not able to open it.
He's always receiving the "Can not find main class" error, which shouldn't pop up since it works perfectly for me. I've already googled but was not able to find a answer.
If you're interested, you can take a look here, if it works for you:
http://www.file-upload.net/download-3939961/WidzDeluxe.jar.html
Now the question I have is kind of obvious I guess, is the error only for him or do you all have the same problem? What's the cause of it?
If people wish, I also upload the code.
You have compiled class files bundled inside this jar with a different (higher) version of Java. Presumably it was Java 1.7 and the friend of yours is trying to open it with Java 1.6.
Here is the stacktrace I received trying to open your executable jar with Java 1.6.0_21:
Exception in thread "main" java.lang.UnsupportedClassVersionError: NewJFrame : Unsupported major.min
or version 51.0
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClassCond(Unknown Source)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$000(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
Could not find the main class: NewJFrame. Program will exit.
One possible solution that came to my ming would be to set the compliance level to let's say 6.0 in Java Compiler settings in Eclipse. That should to the trick.
I had this same problem, found I was compiling the program for Java 1.7. I ended up updating Java on all my computers that I was running it on and it worked great.