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leiningen cannot run because of java class not found exception

I recently--as in, today--became interested in learning to program with clojure. Now after having installed the latest version of java's jdk and downloading the leiningen script, I followed the installation instructions for the latter, specifically those given at: http:/www.lispcast.com/clojure-ubuntu.
Now, after the running lein version and downloading the relevant jar file, the program exits with an error about a class not being found. The error in question reads as follows:
Exception in thread "main" java.lang.ExceptionInInitializerError
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:375)>
at clojure.lang.RT.classForName(RT.java:2168)
at clojure.lang.RT.classForName(RT.java:2177)
at clojure.lang.RT.loadClassForName(RT.java:2196)
at clojure.lang.RT.load(RT.java:443)
at clojure.lang.RT.load(RT.java:419)
at clojure.core$load$fn__5677.invoke(core.clj:5893)
at clojure.core$load.invokeStatic(core.clj:5892)
at clojure.core$load.doInvoke(core.clj:5876)
at clojure.lang.RestFn.invoke(RestFn.java:408)
at clojure.core__init.load(Unknown Source)
at clojure.core__init.(Unknown Source)
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:375)
at clojure.lang.RT.classForName(RT.java:2168)
at clojure.lang.RT.classForName(RT.java:2177)
at clojure.lang.RT.loadClassForName(RT.java:2196)
at clojure.lang.RT.load(RT.java:443)
at clojure.lang.RT.load(RT.java:419)
at clojure.lang.RT.doInit(RT.java:461)
at clojure.lang.RT.(RT.java:331)
at clojure.main.(main.java:20)
Caused by: java.lang.ClassNotFoundException: java/sql/Timestamp
at java.base/java.lang.Class.forName0(Native Method)
at java.base/java.lang.Class.forName(Class.java:375)
at clojure.lang.RT.classForName(RT.java:2168)
at clojure.lang.RT.classForNameNonLoading(RT.java:2181)
at clojure.instant$loading__5569__auto____6869.invoke(instant.clj:9)
at clojure.instant__init.load(Unknown Source)
at clojure.instant__init.(Unknown Source)
... 23 more
My java 9 jdk is installed in /usr/lib/jvm/java-9-oracle/bin/java, with my JAVA_HOME variable set to /usr/lib/jvm/java-9-oracle but I tried /usr/lib/jvm/java-9-oracle/bin as well, just in case. I am running xubuntu 16.04.3, if this is of any importance. I did try setting the default java jdk back to the openjdk which is bundled with xubuntu but this also was to no avail.
As an aside, the entire problem originated because I tried running the REPL
in intellij after installing the cursive plugin, which didn't work. I then surmised that it might be because I had not installed leiningen beforehand (I thought that the IDE and cursive would have this bundled along). However, the actual information on what intellij and clojure require to run successfully has eluded me, since much of the information is rather 'scattered' and I'm not sure whether I missed something along the way.
In any case, I am having quite a hard time of getting everything to work--probably because I'm not yet that savvy when it comes to these kinds of issues, having only been on a linux distro for a short while as well as being completely unfamiliar with clojure. If I'm missing something obvious, I apologize, but it stands to reason that something can only be obvious once it is shown to be so.
Any and all suggestions will be greatly appreciated.

That looks like a problem caused by Java 9's new concept of "modules": Clojure expects to be able to access java.sql.Timestamp, but it can't. I haven't kept up with Java development or Clojure development, so I can't say for sure that's your problem, but it looks that way to me. Try with an earlier JDK.

If you cant downgrade your JAVA version, run lein upgrade 2.8.1 or the latest Leiningen would do. Leiningen has been updated to include support for Java 9.

Google App Engine DataNucleus 3.1.1 Unexpected Exception Error

Trying to find a way to get rid of this error on eclipse.
DataNucleus Enhancer (version 3.1.1) : Enhancement of classes
Encountered a problem: Unexpected exception
Here is the log
java.lang.RuntimeException: Unexpected exception
at com.google.appengine.tools.enhancer.Enhancer.execute(Enhancer.java:76)
at com.google.appengine.tools.enhancer.Enhance.<init>(Enhance.java:71)
at com.google.appengine.tools.enhancer.Enhance.main(Enhance.java:51)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at com.google.appengine.tools.enhancer.Enhancer.execute(Enhancer.java:74)
... 2 more
Caused by: java.lang.IllegalArgumentException
at org.objectweb.asm.ClassReader.<init>(Unknown Source)
at org.objectweb.asm.ClassReader.<init>(Unknown Source)
at org.objectweb.asm.ClassReader.<init>(Unknown Source)
at org.datanucleus.enhancer.asm.ASMClassEnhancer.getClassNameForFileName(ASMClassEnhancer.java:272)
at org.datanucleus.enhancer.DataNucleusEnhancer.getFileMetadataForInput(DataNucleusEnhancer.java:727)
at org.datanucleus.enhancer.DataNucleusEnhancer.enhance(DataNucleusEnhancer.java:525)
at org.datanucleus.enhancer.DataNucleusEnhancer.main(DataNucleusEnhancer.java:1258)
... 7 more
I have two versions of java, one is 1.8.0_25, the other is 1.7.0_46
this is my path
C:\Program Files (x86)\Java\jre7\bin;;C:\oraclexe\app\oracle\product\11.2.0\server\bin;;C:\ProgramData\Oracle\Java\javapath;
and as a default I use the jre7 on eclipse, dont know what else to mention here. I found no solutions clearly explained here or on the other websites rather than trying to change the java version, tried all java instances on my computer, uninstalled and installed again. I am guessing it may be about java and datanucleus compability issue, but currently using the java7 and the plugins i am using were downloaded automatically from eclipse so no clue. If you need any clarifications, ask me out please.

If you are using Java 8, you need to set the compiler compliance level to 1.7 in project properties. You will also need to change the java facet version

Note that (GoogleAppEngine Enhancer Error Code 1:)
App Engine doesn't work with Java 1.8. Try doing it again, with Java 1.7
Setting Java 1.7 in Project settings solves me the problem.

Well like I have guessed, it is all about the compatibility issue. If you are getting this error, make sure EVERYTHING your eclipse AND your computer use is the same version of java everywhere. What I mean is you need to check;
In eclipse, from the top menu choose Project->Properties, then make sure all the versions of java used by eclipse are the same.
AND
AND
and of course your environment variable should point to the same version that eclipse uses.
Hope this helps. Post comments if you found it unclear. Getting errors before even started coding sucks :p

Using tess4j, ghostscript and Java with Eclipse on mac

I am trying to get tess4j working in a simple test application to perform OCR on a pdf file but receive the following error and cannot fathom out how to resolve it:
Exception in thread "main" java.lang.RuntimeException: Unable to load library 'gs': dlopen(libgs.dylib, 9): image not found
Please download, install GPL Ghostscript from http://sourceforge.net/projects/ghostscript/files and/or set the appropriate environment variable.
at net.sourceforge.vietocr.PdfUtilities.convertPdf2Tiff(Unknown Source)
at net.sourceforge.vietocr.ImageIOHelper.getIIOImageList(Unknown Source)
at net.sourceforge.tess4j.Tesseract.doOCR(Unknown Source)
at net.sourceforge.tess4j.Tesseract.doOCR(Unknown Source)
at Test.main(Test.java:11)
I have got eclipse to print out my path file as it sees it and it contains /usr/loca/bin/gs (checked as correct with which gs) as needed and I can happily run gs from the terminal. Any ideas on how to get this working?
The code is shown in the image at https://dl.dropboxusercontent.com/u/61920208/Screen%20Shot%202013-09-02%20at%2013.44.24.png
Thanks in advance for any help

As per the suggestion, reinstalling ghostsrcipt (via ports rather than the dmg)sorted this out for me.

JavaCV-OpenCV error

I want to capture my webcam on a easy way into Java.
I followed this tutorial with JavaCV and OpenCV: http://ganeshtiwaridotcomdotnp.blogspot.com/2011/12/opencv-javacv-eclipse-project.html
I get this error when trying some example code:
Exception in thread "main" java.lang.UnsatisfiedLinkError: C:\Users\Francis\AppData\Local\Temp\jniopencv_core7109340164936655704.dll: Can't find dependent libraries
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1807)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1703)
at java.lang.Runtime.load0(Runtime.java:770)
at java.lang.System.load(System.java:1003)
at com.googlecode.javacpp.Loader.loadLibrary(Loader.java:403)
at com.googlecode.javacpp.Loader.load(Loader.java:342)
at com.googlecode.javacpp.Loader.load(Loader.java:316)
at com.googlecode.javacv.cpp.opencv_core.<clinit>(opencv_core.java:131)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at com.googlecode.javacpp.Loader.load(Loader.java:335)
at com.googlecode.javacv.cpp.opencv_imgproc.<clinit>(opencv_imgproc.java:96)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:247)
at com.googlecode.javacpp.Loader.load(Loader.java:335)
at com.googlecode.javacv.cpp.opencv_highgui.<clinit>(opencv_highgui.java:91)
at com.googlecode.javacv.OpenCVFrameGrabber.start(OpenCVFrameGrabber.java:171)
at beeldherkenningp1.CaptureImage.captureFrame(CaptureImage.java:13)
at beeldherkenningp1.BeeldherkenningP1.main(BeeldherkenningP1.java:37)
But al my jar's are included, Microsoft Visual C++ 2010 Redistributable Package is installed, extracted OpenCV into root and my system Path is set correct... (tryed already several times to reinstal the Visual C++ Redistributable Package). (x64 bit, does it matter Netbeans is x86?)
Or does anybody know an other lib that easily captures a cam in java?
Thanks a lot!

I am the one who wrote the tutorial that you're following.
Exception in thread "main" java.lang.UnsatisfiedLinkError:
C:\Users\Francis\AppData\Local\Temp\jniopencv_core7109340164936655704.dll:
Can't find dependent libraries
It looks like the dll library is not in environment variable path because you didn't properly added the path of opencv. Or this might be issue because you have installed both x64 and x86 version of thet Visual C++ redistribuables that Romain is saying.
I suggest you to follow the steps I described here JavaCV : eclipse project configuration windows ? and Add the following to System Path ?
Configure path
64-bit version of the JDK:
[installation path]\build\common\tbb\intel64\vc10\;C:\opencv\build\x64\vc10\bin\;
32-bit version of the JDK:
[installation path]\build\common\tbb\ia32\vc10\;C:\opencv\build\x86\vc10\bin\;
Here [installation path] might be "C:\opencv"
Hope this helps.
UPDATE:
An easier and simpler step to configure JavaCV is available. Please check the link below:
http://ganeshtiwaridotcomdotnp.blogspot.com/2017/01/javacv-configuration-in-windows.html

7Zip-JBinding UnsatisfiedLinkError

I've looked through a number of the UnsatisfiedLinkError threads on here and nothing seems to quite fit my problem.
I am trying to get this api working: 7ZipBind
However I am having an issue, and cant get the thing to work. I am running some of its example code from the commandline like so:
C:>java -classpath
"/sevenzipTest.jar;/sevenzipjbinding-AllWindows.jar;\sevenzipjbinding.jar"
com.poc.sevenzip.SevenZipSimple c:\archive\test.zip
However when I try to run it I get the error:
Exception in thread "main" java.lang.UnsatisfiedLinkError: D:\Users\XXXX\AppData\Local\Temp\SevenZipJBinding-9640553\lib7-Zip-JBinding.dll: Can't
find dependent libraries
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary0(Unknown Source)
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.load0(Unknown Source)
at java.lang.System.load(Unknown Source)
at net.sf.sevenzipjbinding.SevenZip.initSevenZipFromPlatformJARIntern(SevenZip.java:428)
at net.sf.sevenzipjbinding.SevenZip.initSevenZipFromPlatformJAR(SevenZip.java:235)
at net.sf.sevenzipjbinding.SevenZip.ensureLibraryIsInitialized(SevenZip.java:578)
at net.sf.sevenzipjbinding.SevenZip.openInArchive(SevenZip.java:567)
at com.poc.sevenzip.SevenZipSimple.runZip(SevenZipSimple.java:25)
at com.poc.sevenzip.SevenZipSimple.main(SevenZipSimple.java:64
What I am confused about, is why it says it cant locate the libraries (dll files), when the libraries are stored within the <file_path>/sevenzipjbinding-AllWindows.jar file... I am obviously not doing something correct here, and was hoping some1 can give me some pointers.
Cheers

The bug fix was released. Please, use version 1.06rc or above.
Download URL:
All versions
4.65-1.06rc-extr-only

The following instructions are for Windows x86 and 7 Zip JBinding version 4.65-1.05 RC. Download the following DLLs.
libstdc++-6.dll
libgcc_s_dw2-1.dll
gpsvc.dll
sysntfy.dll
Add the DLLs into the Windows-x86 directory in sevenzipjbinding-AllPlatforms.jar. Then append the following lines to sevenzipjbinding-lib.properties in the Windows-x86 directory in the jar.
sevenzipjbinding.libname.3=gpsvc.dll
sevenzipjbinding.libname.4=libgcc_s_dw2-1.dll
sevenzipjbinding.libname.5=libstdc++-6.dll
sevenzipjbinding.libname.6=sysntfy.dll
Instead of modifying the jar file, one could put the DLLs in the PATH (not classpath).
In order to figure this out, I extracted lib7-Zip-JBinding.dll from sevenzipjbinding-AllPlatforms.jar. I then opened the file in Dependency Walker.