I'm getting the below exception when i'm trying to run my jar file though powershell using the command java -jar restcall.jar:
Error: A JNI error has occurred, please check your installation and
try again Exception in thread "main" java.lang.NoClassDefFoundError:
org/apache/http/client/ClientProtocolException
It complies and runs perfectly in eclipse. Kindly help.
Check the classpath as defined in your Eclipse environment and define the same using the -cp option when invoking java from the powershell.
this error occur because of jdk version and jre version collapse while run time.
if you want to remove the error the check jdk and jre version and if you found the jdk version is different from jre version then uninstall the jdk once and download the jdk version according to version match with your jre setup.now installe it. now try to run a program. you will found it compile and run it successfully.
Related
C:\Users\YusufGalip\Desktop\JavaDeneme>java deneme
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.UnsupportedClassVersionError: deneme has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file versions up to 52.0
I got this error when i tried to run a compiled program.
It's probably compiled with a more recent version of java than the one you are attempting to use running the program. Do you have multiple versions of Java installed?
Try java -version and javac -version and compare the versions. If you use and IDE/editor where Java is configured in the settings, see that it points to the expected directory.
You've compiled your class with Java 11 (55) while you're still trying to execute/run them using Java-8(52).
Either compile the code using Java-8 or execute with Java-11.
The error clearly says that the compiler version was higher than the JVM version with which you are trying to run. That is why you are getting the error on running.
Java 8 uses major version 52
Java 11 uses major version 55
Reference:
https://en.wikipedia.org/wiki/Java_class_file#General_layout
=================
#DO THE FOLLOWING
change your path to point to a more recent version or if you are aware of the version using which the program was compiled, install the version and then execute the same command to run
1) run java -version now
2) Note down the version
3) complete the above #DO ****
4) execute 1) again
5) you should see a different or the latest version
6) run your program :) and you should be able to .... post your results
Finally I solved with your help.
There were 2 Java in my computer one of them is "Java SDK Tools 11" and the second one is "Java Runtime 8" I uninstalled the "Java Runtime 8" and it worked.Thank you for your help.
I'm new using Java and I want to execute a Java program from unix, While I'm trying to execute it I'm getting an the following error:
Exception in thread "main" java.lang.UnsupportedClassVersionError: javaapplicationtest/JavaApplicationTest : Unsupported major.minor version 52.0
I'm using:
java -jar JavaApplicationTest.jar
Do you have any idea how to correct that error?
You seem to have multiple JDK/JRE versions installed on your system.
The code you're trying to run is compiled for JRE 1.8, while the version of java on your PATH is 1.6.
You could do the following things to get your program to run:
Modify your environment variables such that when you try to execute java, it is picking up the 1.8 version. Look up how to do that on the specific UNIX flavor you are running.
If you are compiling the source code yourself, you could change the target runtime to be able to run this code on earlier versions.
javac -target 1.4 JavaApplicationTest.java
I am opening an older NetBeans project and I want to build it using ant in bash with debian. However, when I try to run ant, I get this error
BUILD FAILED
/home/karelbilek/NetBeansProjects/oldProject/nbproject/build-impl.xml:528:
The following error occurred while executing this line:
/home/karelbilek/NetBeansProjects/oldProject/nbproject/build-impl.xml:261:
Unable to find a javac compiler; com.sun.tools.javac.Main is not on
the classpath. Perhaps JAVA_HOME does not point to the JDK. It is
currently set to "/usr/lib/jvm/java-7-openjdk-i386/jre"
What does that mean? What should I do? In "/usr/lib/jvm/java-7-openjdk-i386/jre" there seems to be an actual JRE when I look there, so what is the problem?
You're pointing to a JRE (Java runtime environment) but not a JDK (Java development kit).
Only the JDK contains the compiler (javac). The JRE is used for running Java programs but doesn't carry the extra components of the JDK (compiler etc.)
it happened for me and i got through it by installing the jdk
sudo apt-get install openjdk-7-jdk
After installing jdk, the classpath executed right
When I try to use the eclipse.exe file to start the eclipse it fails. This issue started occuring after I installed JDK 7 on my system .
When I use the command line paramater
eclipse -vm "C:\Program Files\Java\jdk1.7.0_06\bin"
eclipse starts just fine. I am assuming it is something related to the JVM which has caused the issue.
Meanwhile when I try to check java version I get the following error:
C:\Test>java -version
Error occurred during initialization of VM
Not sure if the two are related.
java -version failing indicates to me that you probably need to configure the OS environment variables,
JAVA_HOME=C:\Program Files\Java\jdk1.7.0_06
Path=...;%JAVA_HOME%\bin;
I installed Java, but for some reason NetBeans wont compile my code, I am getting error:
C:\Users\Jay\Desktop\Key Stroke Project\nbproject\build-impl.xml:609: The following error occurred while executing this line:
C:\Users\Jay\Desktop\Key Stroke Project\nbproject\build-impl.xml:250: Error running ${platform.javac} compiler
Any ideas?
The line is:
target="${javac.target}" tempdir="${java.io.tmpdir}">
Open a command shell and type javac -version. You should see the version of Java you installed echoed back.
If the operating system complains about not being able to find the javac.exe command, then you need to add JAVA_HOME/bin to your PATH.
If you don't have a JAVA_HOME/bin, then perhaps you installed the JRE instead of JDK by mistake.
You may need to tell NetBeans how to find Java as well. I'm an IntelliJ user, so I can't be of much help there.