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How to create very small JRE using jrecreate in ejdk for windows 10?

I want to ship my java application (command line tool) along with a small jre. I tried a lot using jrecreate options of ejdk but, I am unable to create jre for windows 10. Please help me in this regard. I referred the following links. It is always creating for linux. How to do it for Windows ?
I used the the following command:
jrecreate.bat --profile compact2 --dest compact2-client --vm all
https://blogs.oracle.com/jtc/introducing-the-ejdk
https://www.oracle.com/technetwork/java/embedded/embedded-se/downloads/index.html
https://docs.oracle.com/javase/8/embedded/develop-apps-platforms/installing.htm

Assumption:
You already know what you are going to package into your JRE.
Like you have a list of dependencies or you have a jar file and you need to extract the dependencies and create a JRE with only those dependencies
If Java version is not of concern then you can stick to Java 9 and follow this post here.
https://medium.com/azulsystems/using-jlink-to-build-java-runtimes-for-non-modular-applications-9568c5e70ef4
I tried this a couple of weeks ago and it worked.
Regarding Win or Linux, it depends upon where you are running the jlink command

I used the following command to get compacted jre with profile compact1 in MAC.
jrecreate.sh -d ./compact1-jre/ -p compact1

Installing and using Emscripten

I installed Emscripten through the steps shown below:
1.) Download the emsdk-portable version for Linux/MacOSX
http://kripken.github.io/emscripten-site/docs/getting_started/downloads.html#sdk-downloads
2.)
Run
$ ./emsdk update
$ ./emsdk install latest
$ ./emsdk activate latest
$ source emsdk_env.sh (To update your environment variables)
I believe everything installed correctly, however I am unable to run emscripten anywhere outside of the emsdk folder.
I need to be able to run em++ in my: Documents/project3/dataviz/graphiti folder.
Also, when I run em++ -v in my emsdk folder, I get the following message I have been unable to resolve:
Java does not seem to exist, requierd for closure compiler,
which is optional (define JAVA in /home/bryce/.emscripten if you want it)
I attempted to define the java path in the folder, but I'm not sure how it should look.
Any help resolving these two issues would be very much appreciated.

The first problem sounds like the PATH isn't being set correctly. Type echo $PATH after running source emdsk_env.sh and check that the path to your emscripten installation has been added.
Note that you have to export the PATH for each terminal session you're using (it might be an idea to put source <path to emsdk dir>/emsdk_env.sh in your .bashrc file so this gets done automatically).
Could this link help with the second problem?
https://kripken.github.io/emscripten-site/docs/building_from_source/verify_emscripten_environment.html#installing-missing-components

Tess4j unsatisfied link error on mac OS X

Hey i am trying to use tess4j for tesseract and having this issue for eclipse on mac osx .
My tesseract is working fine from terminal but trying to run tess4j through tesseract throws me an error .
java.lang.UnsatisfiedLinkError: Unable to load library 'tesseract': Native library (darwin/libtesseract.dylib)
i do have tessetact dylib and its named libtesseract.dylib in my opt/local/lib which i installed using macport .
Thanks for your help

I know it's an old post. I had this problem too recently when I tried to use Tess4J. However, I managed to find a way around it. I've written a post about it http://www.microshell.com/programming/java/performing-optical-character-recognition-in-java/
In short, the problem is because tess4j-2.0.0.jar doesn't include MacOS library. So I just modified the maven cached jar on mine by doing these steps:
cd /Users/user/.m2/repository/net/sourceforge/tess4j/tess4j/2.0.0 (adjust the directory where your tess4j JAR file resides)
mkdir darwin
jar uf tess4j-2.0.0.jar darwin
cp /opt/local/lib/libtesseract.3.dylib darwin/libtesseract.dylib
jar uf tess4j-2.0.0.jar darwin/libtesseract.dylib
jar tf tess4j-2.0.0.jar (to verify that the file is included)
I was then able to run my Java program after I modify the tess4j-2.0.0.jar file. Below is my MacOS version.
user#laptop:~$ uname -a
Darwin Maresas-MacBook-Pro.local 14.3.0 Darwin Kernel Version 14.3.0: Mon Mar 23 11:59:05 PDT 2015; root:xnu-2782.20.48~5/RELEASE_X86_64 x86_64

I had a very similar issue with Ghost4j, i.e.
InvocationTargetException: Unable to load library 'gs': Native library (darwin/libgs.dylib) not found in resource path
Instead of modifying jar files, point jna to the appropriate lib path by setting jna.library.path. In Eclipse, you need to set the system property in run configurations - SO answer for this here - https://stackoverflow.com/a/862405/2163229
If you're using Maven exec:
mvn -Djna.library.path=/opt/local/lib/ exec:java -Dexec.mainClass="foo.bar.NativeThingy"
or
export MAVEN_OPTS="-Djna.library.path=/opt/local/lib/" && mvn exec:java -Dexec.mainClass="foo.bar.NativeThingy"
Obviously, set the path to wherever your libs are installed. In my case, I ran $ locate libgs.dylib and found the above path.
References:
https://jna.java.net/javadoc/com/sun/jna/NativeLibrary.html

You need install the tesseract lib on your Mac.
brew install tesseract --with-all-languages

#maresa after a few years your comment helped me, thanks a lot :) A bit different paths, maybe it'll help someone:
cd /Users/username/.m2/repository/net/sourceforge/tess4j/tess4j/4.5.4/
mkdir darwin
jar uf tess4j-4.5.4.jar darwin/
brew info tesseract (here you can find path to libtesseract.4.dylib)
cp /usr/local/Cellar/tesseract/4.1.1/lib/libtesseract.4.dylib darwin/libtesseract.dylib
jar uf tess4j-4.5.4.jar darwin/libtesseract.dylib
jar tf tess4j-4.5.4.jar
MacOS Catalina - 10.15.3

Make sure you use libtesseract.dylib of Tesseract 3.02 version. Check out this post on Tesseract Forum.

This is exactly what I was after today, so thanks for the Q&A above. As one additional step beyond what maresa mentioned, I ran into this error after fixing the one you asked about:
java.lang.UnsatisfiedLinkError: dlopen(/var/folders/sq/rh89_ntd7jqdlv9__25zj9dr0000gp/T/jna--913086793/jna8800789057827590119.tmp, 9): Library not loaded: /usr/local/lib/libjpeg.8.dylib
Referenced from: /usr/local/lib/liblept.4.dylib
Reason: image not found
So to fix this I needed to set up a symlink for libjpeg.8.dylib:
ln -s /usr/local/Cellar/jpeg/8d/lib/libjpeg.8.dylib /usr/local/lib/libjpeg.8.dylib
Not sure if there is a way to do this without the symlink (i.e. package it in the jar), but I hope this helps anyone else who is looking at this post.

Based on maresa's answer above, which works perfectly, I wrote a library that will make it easy to patch the tess4j.jar file with the appropriate C library from tesseract. You can get it here.

Could not find or load main class org.apache.hadoop.util.VersionInfo

I followed "http://codesfusion.blogspot.com/2013/10/setup-hadoop-2x-220-on-ubuntu.html" to install hadoop on ubuntu. But, upon checking the hadoop version I get the following error:
Error: Could not find or load main class
org.apache.hadoop.util.VersionInfo
Also, when I try: hdfs namenode -format
I get the following error:
Error: Could not find or load main class
org.apache.hadoop.hdfs.server.namenode.NameNode
The java version used is:
java version "1.7.0_25"
OpenJDK Runtime Environment (IcedTea 2.3.10) (7u25-2.3.10-1ubuntu0.12.04.2)
OpenJDK 64-Bit Server VM (build 23.7-b01, mixed mode)

It is a problem of environmental variables setup. Apparently, I didnt find one which can work until NOW. I was trying on 2.6.4. Here is what we should do
export HADOOP_HOME=/home/centos/HADOOP/hadoop-2.6.4
export HADOOP_INSTALL=$HADOOP_HOME
export HADOOP_MAPRED_HOME=$HADOOP_HOME
export HADOOP_COMMON_HOME=$HADOOP_HOME
export HADOOP_HDFS_HOME=$HADOOP_HOME
export YARN_HOME=$HADOOP_HOME
export HADOOP_COMMON_LIB_NATIVE_DIR=$HADOOP_HOME/lib/native
export PATH=$PATH:$HADOOP_HOME/sbin:$HADOOP_HOME/bin
export HADOOP_CONF_DIR=$HADOOP_HOME
export HADOOP_PREFIX=$HADOOP_HOME
export HADOOP_LIBEXEC_DIR=$HADOOP_HOME/libexec
export JAVA_LIBRARY_PATH=$HADOOP_HOME/lib/native:$JAVA_LIBRARY_PATH
export HADOOP_CONF_DIR=$HADOOP_PREFIX/etc/hadoop
Add these into your .bashrc and dont forget to do
source ~/.bashrc
I think your problem will be solved as was mine.

You probably did not follow the instructions correctly. Here are some things to try and help us / you diagnose this:
In the shell that you ran hadoop version, run export and show us the list of relevant environment variables.
Show us what you put in the /usr/local/hadoop/etc/hadoop/hadoop-env.sh file.
If neither of the above gives you / us any clues, then find and use a text editor to (temporarily) modify the hadoop wrapper shell script. Add the line "set -xv" somewhere near the beginning. Then run hadoop version, and show us what it produces.

Adding this line to ~/.bash_profile worked for me.
export HADOOP_PREFIX=/<where ever you install hadoop>/hadoop
So just:
$ sudo open ~/.bash_profile then add the aforesaid line
$ source ~/.bash_profile
Hope this helps (:

I was facing the same issue. Although it may seem so simple but took away 2 hrs of my time. I tried all the things above but it didn't help.
I just exit the shell i was in and tried again by logging into the system again. Then things worked!

Try to check:
JAVA_HOME, all PATH related variables in Hadoop config
run: . ~/.bashrc (note the dot in front) to make those variables available in your environment. It seems that the guide does not mention this.

I got the same problem with hadoop 2.7.2
after I applied the trick shown I was able to start hdfs but later I discovered that the tar archivie I was using was missing some important pieces. So downloading the 2.7.3 everything worked as it is supposed to work.
My first suggestion is to download again the tar.gz at the same version or major.
If you are continuing to reading... this how I solved the problem...
After a fresh install hadoop was not able to find the jars.
I did this small trick:
I located where the jars are
I did a symbolic link of the folder to
$HADOOP_HOME/share/hadoop/common
ln -s $HADOOP_HOME/share/hadoop/kms/tomcat/webapps/kms/WEB-INF/lib $HADOOP_HOME/share/hadoop/common
for version command you need hadoop-common-2.7.2.jar, this helped me to find where the jars where stored.
After that...
$ bin/hadoop version
Hadoop 2.7.2
Subversion https://git-wip-us.apache.org/repos/asf/hadoop.git -r b165c4fe8a74265c792ce23f546c64604acf0e41
Compiled by jenkins on 2016-01-26T00:08Z
Compiled with protoc 2.5.0
From source with checksum d0fda26633fa762bff87ec759ebe689c
This command was run using /opt/hadoop-2.7.2/share/hadoop/kms/tomcat/webapps/kms/WEB-INF/lib/hadoop-common-2.7.2.jar
Of course any hadoop / hdfs command works now.
I'm again an happy man, I know this is not a polite solution but works at least for me.

I got that error , I fixed that by editing ~/.bashrc
as follow
export HADOOP_HOME=/usr/local/hadoop
export PATH=$HADOOP_HOME/bin:$PATH
then open terminal and write this command
source ~/.bashrc
then check
hadoop version

Here is how it works for Windows 10 Git Bash (mingw64):
export HADOOP_HOME="/PATH-TO/hadoop-3.3.0"
export PATH=$PATH:$HADOOP_HOME/sbin:$HADOOP_HOME/bin
export HADOOP_CLASSPATH=$(cygpath -pw $(hadoop classpath)):$HADOOP_CLASSPATH
hadoop version
copied slf4j-api-1.6.1.jar into hadoop-3.3.0\share\hadoop\common

I added the environment variables described above but still didn't work. Setting the HADOOP_CLASSPATH as follows in my ~/.bashrc worked for me:
export HADOOP_CLASSPATH=$(hadoop classpath):$HADOOP_CLASSPATH

I used
export PATH=$HADOOP_HOME/bin:$PATH
Instead of
export PATH=$PATH:$HADOOP_HOME/bin
Then it worked for me!

Having Problems Getting FreeTTS and JSAPI Working

First off I'm on Ubuntu linux if that matters.
I have a simple project idea based off of FreeTTS and the JSAPI (Java Speech API)
I've downloaded and unpacked FreeTTS and run their build script. Then tried compiling my code linking several jar's required in the lib directory into the class path like this:
javac -cp /home/travis/Desktop/freetts-1.2/lib/jsapi.jar:/home/travis/Desktop/freetts-1.2/lib/freetts.jar HelloUnleashedReader.java
Which then compiles to java bytecode just fine.
However when I run:
java HelloUnleashedReader
I get the following error:
Exception in thread "main" java.lang.NoClassDefFoundError: javax/speech/EngineModeDesc
Any help on this issue would be greatly appreciated as there are many sites around the net discussing problems with getting it to work but not many that discuss their solution.

I see that you are using Ubuntu. You must agree to the binary license before you can use jsapi.jar. You agree to this license in the process of unpacking it. To unpack jsapi.jar in Ubuntu you would type the following:
cd ~/Desktop/freetts-1.2/lib
chmod +x ./jsapi.sh
./jsapi.sh
if you receive a message like
"./jsapi.sh: 1428: uudecode: not found"
then install uudecode with
sudo apt-get install sharutils
and try again

You need to add the jsapi.jar into your classpath. The jsapi.jar can be unpacked by running lib/jsapi.exe inside the freetts installation directory.

I got this error despite I had jsapi.jar on classpath.
java -cp `ls *.jar | awk '{ORS=":";print}'` -jar WebStartClock.jar
What helped me was specifying the main class explicitely:
java -cp `ls *.jar | awk '{ORS=":";print}'` JSAPIClock
Probably something wrong in the JAR metadata or so.