When I use certain jars in one of the connector projects i write for lombardi in TeamWorks eclipse i get a bad class version exception...
any ideas how this might be resolved..
Regards,
Adhir
You will get this error if you are using (say) Java 1.5 and you are using a JAR compiled with Java 1.6.
The easiest way to resolve is to upgrade your version of Java to the one used by the JAR.
Try to compile/recompile all your stuff with the same compiler.
Typically this happens when you have something compiled with a higher version and
you try to run it with an older one.
This problem can also be caused by an expired (365-day) Android certificate referenced by Eclipse.
See "Debug certificate expired" error in Eclipse Android plugins for details.
This is a result of running code compiled with a compiler version that is greater than the version of java you are using to run it. IE Code compiled with 1.6 and you are running it with 1.5. See this post to determine what version it was compiled with.
how-can-i-find-the-target-java-version-for-a-compiled-class
the easiest fix is to run it with the most recent JVM.
Root Cause for this error is that: jars including in your project is complied from other version of java and you are compiling your project from other version of java simply upgrading version of java will resolve this problem.
I also faced the same problem.
Related
I'm rather new to IntelliJ IDEA and Grails in general. I just started a new Project, selected my project JDK (11.0.1) and Gradle distribution (4.10.2). Whenever I try to run the project, I get this error:
Error initializing classpath: Could not determine java version from
'11.0.1'. java.lang.IllegalArgumentException: Could not determine java
version from '11.0.1'. at
org.gradle.api.JavaVersion.toVersion(JavaVersion.java:68) at
org.gradle.api.JavaVersion.current(JavaVersion.java:78) at
org.gradle.internal.jvm.UnsupportedJavaRuntimeException.assertUsingVersion(UnsupportedJavaRuntimeException.java:29)
at
org.gradle.tooling.internal.consumer.ConnectorServices.checkJavaVersion(ConnectorServices.java:66)
at
org.gradle.tooling.internal.consumer.ConnectorServices.close(ConnectorServices.java:53)
at
org.gradle.tooling.internal.consumer.DefaultGradleConnector.close(DefaultGradleConnector.java:57)
at
org.grails.cli.gradle.cache.CachedGradleOperation.call(CachedGradleOperation.groovy:78)
at
org.grails.cli.GrailsCli.populateContextLoader(GrailsCli.groovy:525)
at org.grails.cli.GrailsCli.initializeProfile(GrailsCli.groovy:508)
at
org.grails.cli.GrailsCli.initializeApplication(GrailsCli.groovy:306)
at org.grails.cli.GrailsCli.execute(GrailsCli.groovy:269) at
org.grails.cli.GrailsCli.main(GrailsCli.groovy:159)
All other discussions of the problem I found suggested changing the Gradle distribution, which I already did. I would be so happy if anybody could help me out here.
Cheers!
May be your java configuration is not correct. If not correct follow this steps.
Goto File-> Project Structure.
Change SDK
Or gradle version is not matching jdk 11 then skip this answer.
Besides the issue with Gradle above, if you're trying to run a Grails project I don't think you can do that with JDK higher than version 8.
Even the latest Grails (3.3.8 as of this writing) is still based on SpringBoot 1.5 which does not support newer JDK, I don't know if there's a special trick to make it work.
I had to delete the .gradle directory and restart Intellij.
The type java.util.Comparator cannot be resolved. It is indirectly referenced from required .class files
I recently installed Java 8. While executing an application, I got above mentioned error can you please help me.
I am using:
Java - jdk1.8.0_51
Tomcat - apache-tomcat-5.5.26
Assuming you are using some IDE, like Eclipse. When you are using jdk 1.8 with IDE, you need to update your IDE to support version 1.8.
It does not matter you are using new jdk's feature or not, but compiler has to load new JRE files in order to compile your project.
If you are using IntelliJ, go to:
File/Settings/Build, Execution, Deployment/Compiler/Java Compiler
and make sure "Use compiler" and "Project bytecode version" have the right configuration.
I had this same error and tried many things to fix it, but finally worked was remarkably simple: It turns that I was simply using an older version of Eclipse that did not support a "Compliance Level" setting of Java that was as high as my JRE. I merely upgraded to a newer version and the problem went away.
From what I understand about "Compliance Level", it's the version of Java that your program is supposed to work on. That much I found out from reading stuff on the net. But what the other solutions did not mention is that your IDE has to be able to be set to a level as high as your JRE. In my case, I was using JRE 1.8, but the highest compliance level my older IDE supported was 1.6.
IMO, this situation should have been flagged as an error by Eclipse. But as it was, I wasted two nights trying to figure this out.
Your project build path could be referring to a jre instead of JDK.
Go to your build path. (In eclipse right click and choose build path).
Go to your libraries and replace the jre with the jdk.
pom.xml version is 1.6?
If this is the way,you would replace jdk1.8 with jdk1.6 ，and environment variable into jdk1.6。
Same strange problem occurred. It turned out that wrong jdk version was in JAVA_HOME
There you are I had the same issue but moment I saw your question i got it fixed. problem is you are not using old version since there is mismatch of referencing with new version. this error will come.
Work around:
1. Change your java version to old.(In my case I had to change to 7)
2. Update each libray and jar file compatible to java 8 that way it will refer java not class file
Here is the image of environment variable in my problem
check if build path is set to run with JDK. It is important point that JKD is software development kit while JRE is a runtime env. Advice who had this problem see the different between JDK, JRE and JVM. https://www.guru99.com/difference-between-jdk-jre-jvm.html
I'm working on a service to prepare spreadsheet for a report. I'm using jxl-2.4.2.jar to achieve this ( please note that I can't use the latest version due to compatibility constraints). When I execute the code locally on my eclipse it works fine. My eclipse has java 1.5.
When I deploy my code in my test environment, its giving NoClassdefFound error for jxl.* ( any classes in jxl ). My test environment has IBM's java 1.5. I believe it doesn't make any difference if I use IBM's version or Sun's version of java in this context.
I believe this error could happen when JVM fails to load the class at runtime or if the class has any static methods/properties. I checked the classes and none of them have static contents. So, this could be something else.
FYI.. I'm using ant to build the project & I check the build.xml. It is showing the correct version of java 1.5. Could someone please help to fix this error? Also Just FYI.. my project resides on AIX 5.0 server.
Any help in this regard much appreciated. Thanks in advance.
This error implies that your dependency is missing at runtime i.e. the set of dependent jars is not not correct.
jxl-2.4.2.jar is not getting shipped along with deployment, so just to resolve the issue , you can manually copy this jar in dependent lib folder of deployment.
But proper fix will be to get your ANT build checked.
I am looking for clarification in jdk versions.
I am getting error
java.lang.UnsupportedClassVersionError:Bad version number in .class file"
I hope this error is for different jdk version. I am having myeclipse6.0.1 and weblogic10.3.
Now, in my systems has jdk1.5 but weblogic has jdk1.6, as well myeclipse supporting 1.5 only.
I read the all forums and they said compile is different version and running different version.
So, here i thought program compliling 1.5 and running 1.6.
Is it correct ?
This means that the Java program was compiled for a newer version of Java than you are trying to run it with.
The easiest way to be certain is to use the same version of Java for compiling and building as is to be used on the final system. For you, this is most likely Java 5.
If a class compiled with JDK 1.6 calls another class compiled with JDK 1.5, what kind of errors will we see?
Class Not found exception?
Class cast exception?
NoSuch method exception?
You should encounter no problems doing this. I have a code library with packages compiled with everything from 1.2 to 1.4 and have had absolutely no problems using it with applications compiled with Java 5 and Java 6.
I was getting the error 'Caused by: java.lang.NoClassDefFoundError:" file name
Check for the file whether deploy in correct path in server or not.
If deploy correctly and still not picking then check the environment java version and Eclipse java version.Both should be matched.
If not matching then took the file from environment and recompile the java file in eclipse by setting the Eclipse compilation configuration changing to the Environment java version.
Deploy it in server and Enjoy.