Develop Reference

CMake could not find JNI

I created a new Android Studio Project with C++ support and did not add anything to it. The project builds, compiles and runs with CMake. I then added the following two lines of code to CMakeLists.txt at the bottom of the file and I get a CMake build error.
find_package(Java COMPONENTS Development) # Line 47
find_package(JNI REQUIRED) # Line 48
And this is the error I get when building the project
-- Found Java: /usr/lib/jvm/java-10-oracle/bin/java (found version "10.0.1") found components: Development
-- Configuring incomplete, errors occurred!
CMake Error at /home/xxxxx/Android/Sdk/cmake/3.6.4111459/share/cmake-3.6/Modules/FindPackageHandleStandardArgs.cmake:148 (message):
Could NOT find JNI (missing: JAVA_AWT_LIBRARY JAVA_JVM_LIBRARY
See also "/home/xxxxx/AndroidStudioProjects/MyApplication/app/.externalNativeBuild/cmake/release/x86_64/CMakeFiles/CMakeOutput.log".
JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH)
Call Stack (most recent call first):
/home/xxxxxx/Android/Sdk/cmake/3.6.4111459/share/cmake-3.6/Modules/FindPackageHandleStandardArgs.cmake:388 (_FPHSA_FAILURE_MESSAGE)
/home/xxxxxx/Android/Sdk/cmake/3.6.4111459/share/cmake-3.6/Modules/FindJNI.cmake:314 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
CMakeLists.txt:48 (find_package)
External native generate JSON release: JSON generation completed with problems
CMake runs when being called form the command line, but fails inside Android Studio for some reason and I am not sure why.
EDIT 1
Here is the CMakeOutput.log file
EDIT 2
This is all that is in CMakeLists.txt file. It compiles in cmd with the command cmake.
cmake_minimum_required(VERSION 3.4.1)
find_package(Java COMPONENTS Development)
find_package(JNI REQUIRED)
This is the cmd output
E:\Users\xxxxx\AndroidStudioProjects\MyApplication\app\build>cmake ..
-- Configuring done
-- Generating done
-- Build files have been written to: E:/Users/xxxxx/AndroidStudioProjects/MyApplication/app/build
When I try to add it compile it in Android Studio using gradle I get the following error on Windows 10 pro 64 bit
Microsoft Windows [Version 10.0.17134.112]
(c) 2018 Microsoft Corporation. All rights reserved.
E:\Users\xxxxx\AndroidStudioProjects\MyApplication>gradlew build --stacktrace
> Task :app:generateJsonModelDebug
External native generate JSON debug: starting JSON generation
External native generate JSON debug: using platform version 24 for ABI ARMEABI_V7A and min SDK version 24
External native generate JSON debug: noticing that build file 'E:\Users\xxxxx\AndroidStudioProjects\MyApplication\app\CMakeLists.txt' is out of date with respect to E:\Users\xxxxx\AndroidStudioProjects\MyApplication\app\.extern
alNativeBuild\cmake\debug\armeabi-v7a\android_gradle_build.json
External native generate JSON debug: rebuilding JSON E:\Users\xxxxx\AndroidStudioProjects\MyApplication\app\.externalNativeBuild\cmake\debug\armeabi-v7a\android_gradle_build.json due to:
External native generate JSON debug: - a dependent build file changed
External native generate JSON debug: keeping json folder 'E:\Users\xxxxx\AndroidStudioProjects\MyApplication\app\.externalNativeBuild\cmake\debug\armeabi-v7a' but regenerating project
External native generate JSON debug: executing cmake Executable : E:\Android\SDK\cmake\3.6.4111459\bin\cmake.exe
arguments :
-HE:\Users\xxxxx\AndroidStudioProjects\MyApplication\app
-BE:\Users\xxxxx\AndroidStudioProjects\MyApplication\app\.externalNativeBuild\cmake\debug\armeabi-v7a
-DANDROID_ABI=armeabi-v7a
-DANDROID_PLATFORM=android-24
-DCMAKE_LIBRARY_OUTPUT_DIRECTORY=E:\Users\xxxxx\AndroidStudioProjects\MyApplication\app\build\intermediates\cmake\debug\obj\armeabi-v7a
-DCMAKE_BUILD_TYPE=Debug
-DANDROID_NDK=E:\Android\SDK\ndk-bundle
-DCMAKE_CXX_FLAGS=
-DCMAKE_TOOLCHAIN_FILE=E:\Android\SDK\ndk-bundle\build\cmake\android.toolchain.cmake
-DCMAKE_MAKE_PROGRAM=E:\Android\SDK\cmake\3.6.4111459\bin\ninja.exe
-GAndroid Gradle - Ninja
jvmArgs :
CMake Error at E:/Android/SDK/cmake/3.6.4111459/share/cmake-3.6/Modules/FindPackageHandleStandardArgs.cmake:148 (message):
Could NOT find JNI (missing: JAVA_AWT_LIBRARY JAVA_JVM_LIBRARY
JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH)
Call Stack (most recent call first):
E:/Android/SDK/cmake/3.6.4111459/share/cmake-3.6/Modules/FindPackageHandleStandardArgs.cmake:388 (_FPHSA_FAILURE_MESSAGE)
E:/Android/SDK/cmake/3.6.4111459/share/cmake-3.6/Modules/FindJNI.cmake:314 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
CMakeLists.txt:4 (find_package)
-- Configuring incomplete, errors occurred!
See also "E:/Users/xxxxx/AndroidStudioProjects/MyApplication/app/.externalNativeBuild/cmake/debug/armeabi-v7a/CMakeFiles/CMakeOutput.log".

Could NOT find JNI (missing: JAVA_AWT_LIBRARY JAVA_JVM_LIBRARY
Solved with
sudo apt-get install -y openjdk-8-jdk
sudo apt-get install -y default-jdk
export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64

As the CMake version bundled with Android tries to tell you, it can't find the JNI package because some parts were missing:
missing: JAVA_AWT_LIBRARY JAVA_JVM_LIBRARY JAVA_INCLUDE_PATH2 JAVA_AWT_INCLUDE_PATH
Checking the documentation for FindJNI (https://cmake.org/cmake/help/latest/module/FindJNI.html) these variables are set to the locations of libraries and headers not shipped with the Android version of JNI (to little surprise, Android does not included the AWT library for instance).
When running find_package(JNI REQUIRED), the FindJNI code checks if these variables are set and if not, issues an error.
A workaround is to set these variables yourself, before calling find_package:
# We are only interested in finding jni.h: we do not care about extended JVM
# functionality or the AWT library.
set(JAVA_AWT_LIBRARY NotNeeded)
set(JAVA_JVM_LIBRARY NotNeeded)
set(JAVA_INCLUDE_PATH2 NotNeeded)
set(JAVA_AWT_INCLUDE_PATH NotNeeded)
find_package(JNI REQUIRED)
Be aware though, that your code will only be able to use jni.h and its functionality: if it tries to access any other part of the JNI package it will fail (probably at compile time) because essentially, you have tricked CMake into thinking that the entire package was found, when in reality only a part of it exists in the Android setup.

I found a solution that works for me:
cmake_minimum_required(VERSION 3.10)
project("ktaglib")
set(JAVA_AWT_LIBRARY "$ENV{JAVA_HOME}/lib/libjawt.so")
set(JAVA_JVM_LIBRARY "$ENV{JAVA_HOME}/lib/server/libjvm.so")
set(JAVA_INCLUDE_PATH "$ENV{JAVA_HOME}/include")
set(JAVA_INCLUDE_PATH2 "$ENV{JAVA_HOME}/include/linux")
set(JAVA_AWT_INCLUDE_PATH "$ENV{JAVA_HOME}/include")
find_package(JNI REQUIRED)
You must set the environment variable JAVA_HOME="/usr/lib/jvm/java-11-openjdk-amd64" beforehand.
More info: https://github.com/dockcross/dockcross/issues/576

Same on alpine:edge docker image, fixed using:
ENV JAVA_HOME=/usr/lib/jvm/java-1.8-openjdk
RUN apk add --no-cache openjdk8
ref: https://pkgs.alpinelinux.org/contents?branch=edge&name=openjdk8&arch=x86_64&repo=community

Hadoop build Failing in Windows: zconf.h is missing from native.sln?

I'm trying to build the following hadoop version on development computer with Windows 10 Home Edition
hadoop-2.7.3-src
Here are the details about my local development environment:
-Windows 10 Home Edition
-Intel Core i5-6200U CPU #2.30GHz
-RAM 16 GB
-64-bit Operating System, x64-based processor
-Microsoft Visual Studio Community 2015 Version 14.0.25431.01 Update 3
-Also added MSBUILD location as C:\Program Files (x86)\MSBuild\14.0\Bin\amd64 to Windows System Environment Variable Path
-.NET Framework 4.6.01586
-cmake version 3.7.2
-CYGWIN_NT-10.0 LTPBCV82DUG 2.7.0(0.306/5/3) 2017-02-12 13:18 x86_64 Cygwin
-java version "1.8.0_121"
-Java(TM) SE Runtime Environment (build 1.8.0_121-b13)
-Java HotSpot(TM) 64-Bit Server VM (build 25.121-b13, mixed mode)
-Apache Maven 3.3.9 (bb52d8502b132ec0a5a3f4c09453c07478323dc5; 2015-11-10T11:41:47-05:00)
-Google Protocol Buffers protoc --version libprotoc 2.5.0
Also, I've created and system environment variable called Platform and set it to x64
I opened up Developer Command Prompt for Visual Studio 2015 (VS2015)
c:\hadoop\hadoop-2.7.3-src> mvn package -Pdist,native-win -DskipTests -Dtar -X
Unfortunately, I'm getting the following error:
[C:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\native.vcxproj]
ZlibDecompressor.c
c:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\src\org\apache\hadoop\io\compress\zlib\org_apache_hadoop_io_compress_zlib.h(36): fatal error C1083: Cannot open include file: 'zlib.h': No such file or directory [C:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\native.vcxproj]
Done Building Project "C:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\native.vcxproj" (default targets) -- FAILED.
Done Building Project "C:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\native.sln" (default targets) -- FAILED.
Build FAILED.
"C:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\native.sln" (default target) (1) ->
"C:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\native.vcxproj" (default target) (2) ->
(ClCompile target) ->
c:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\src\org\apache\hadoop\io\compress\zlib\org_apache_hadoop_io_compress_zlib.h(36): fatal error C1083: Cannot open include file: 'zlib.h': No such file or directory [C:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\native.vcxproj]
c:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\src\org\apache\hadoop\io\compress\zlib\org_apache_hadoop_io_compress_zlib.h(36): fatal error C1083: Cannot open include file: 'zlib.h': No such file or directory [C:\hadoop\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\native.vcxproj]
0 Warning(s)
2 Error(s)
Time Elapsed 00:00:02.49
The aforementioned error has to do with zlib tool.
After researching online, someone said that the following Visual Studio solution file needs to be built successfully in Visual Studio:
....\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\native\native.sln
Using Visual Studio 2015 in Administrator mode, I opened up the native.sln file, and immediately saw an error:
enter image description here
Could someone please tell me what steps I have to take to resolve said error?

So there were quite a few steps I had to take in order to resolve the problems.
Within the ....\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\winutils directory, I opened up the following solution in Visual Studio 2015:
winutils.sln
Within .....\hadoop-2.7.3-src\hadoop-common-project\hadoop-common\src\main\winutils\libwinutils.c , I commented out the following line of code, and made a modified copy of it as shown below:
//const WCHAR* wsceConfigRelativePath = WIDEN_STRING(STRINGIFY(WSCE_CONFIG_DIR)) L"\\" WIDEN_STRING(STRINGIFY(WSCE_CONFIG_FILE));
const WCHAR* wsceConfigRelativePath = WIDEN_STRING("../etc/hadoop") L"\\" WIDEN_STRING("wsce-site.xml");
Also, In the winutils solution's property window, I had to set the platform value to x64 as the screenshot below shows:
Next, I opened Dos command prompt, and checked the exact version of my Windows OS:
ver
Microsoft Windows [Version 10.0.14393]
Also, I opened up the property window of the libwinutils project, and ensured that properties that are marked in the following snapshot had the proper values:
Also, I took the same steps for the properties of the winutils project:
(Sorry, stackoverflow would not allow me to place another picture snapshot, but all you basically have to do is make sure the the winutils project's property are set properly )
I downloaded zlib version 1.2.11 source code. Using Developer Command Prompt for VS2015 ( Visual Studio 2015 ) I built zlib from zlib version 1.2.11 source code using cmake
c:\zlib\zlib-1.2.11>cmake -G "Visual Studio 14 2015" -A x64 c:\zlib\zlib-1.2.11\
-- The C compiler identification is MSVC 19.0.24215.1
-- Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/x86_amd64/cl.exe
-- Check for working C compiler: C:/Program Files (x86)/Microsoft Visual Studio 14.0/VC/bin/x86_amd64/cl.exe -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Looking for sys/types.h
-- Looking for sys/types.h - found
-- Looking for stdint.h
-- Looking for stdint.h - found
-- Looking for stddef.h
-- Looking for stddef.h - found
-- Check size of off64_t
-- Check size of off64_t - failed
-- Looking for fseeko
-- Looking for fseeko - not found
-- Looking for unistd.h
-- Looking for unistd.h - not found
-- Configuring done
-- Generating done
-- Build files have been written to: C:/zlib/zlib-1.2.11
Finally, run the build with cmake
c:\zlib\zlib-1.2.11>cmake --build .
In Windows System Variables I have the following variable defined:
ZLIB_HOME is set to C:\zlib\zlib-1.2.11

jnetpcap - java.lang.UnsatisfiedLinkError: com.slytechs.library.NativeLibrary.dlopen(Ljava/lang/String;)J

I am using IntelliJ to run a sample java-jnetpcap application. I have 64 bit JDK in the class path and included the following dependency
<dependency>
<groupId>jnetpcap</groupId>
<artifactId>jnetpcap</artifactId>
<version>1.4.r1425-1f</version>
</dependency>
I am running the below sample.java class
public class PcapReaderDemo
{
private static final String filePath= "/src/main/resources/TAPcapture.pcap";
public static void main(String [] arguments){
final StringBuilder errbuf = new StringBuilder();
Pcap pcap = Pcap.openOffline(filePath,errbuf);
if (pcap == null) {
System.err.printf("Error while opening device for capture: "
+ errbuf.toString());
return;
}
PcapPacketHandler<String> jpacketHandler = new PcapPacketHandler<String>() {
public void nextPacket(PcapPacket packet, String user) {
System.out.printf("Received at %s caplen=%-4d len=%-4d %s\n",
new Date(packet.getCaptureHeader().timestampInMillis()),
packet.getCaptureHeader().caplen(), // Length actually captured
packet.getCaptureHeader().wirelen(), // Original length
user // User supplied object
);
}
};
System.out.println("Cleared");
}
}
It is throwing the below exception:
PcapReaderDemo
Exception in thread "main" java.lang.UnsatisfiedLinkError: com.slytechs.library.NativeLibrary.dlopen(Ljava/lang/String;)J
at com.slytechs.library.NativeLibrary.dlopen(Native Method)
at com.slytechs.library.NativeLibrary.<init>(Unknown Source)
at com.slytechs.library.JNILibrary.<init>(Unknown Source)
at com.slytechs.library.JNILibrary.loadLibrary(Unknown Source)
at com.slytechs.library.JNILibrary.register(Unknown Source)
at com.slytechs.library.JNILibrary.register(Unknown Source)
at com.slytechs.library.JNILibrary.register(Unknown Source)
at org.jnetpcap.Pcap.<clinit>(Unknown Source)
at com.demo.myapexapp.PcapReaderDemo.main(PcapReaderDemo.java:20)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
Please suggest your inputs on where it is going wrong.

I solved the same issue this way:
using Ubuntu 16.04
installing jre-1.8.0_181 manually:
download specific java version (https://www.oracle.com/technetwork/java/javase/downloads/java-archive-javase8-2177648.html) jre-8u181-linux-x64.tar.gz
create java directory: mkdir /opt/jre
extract java: tar -zxf jre-8u181-linux-x64.tar.gz
Update used java version:
update-alternatives --install /usr/bin/java java /opt/jre/jre1.8.0_181/bin/java 100
Download, extract und copy jnetpcap files to lib directory
wget -O jnetpcap-1.4.r1425 https://downloads.sourceforge.net/project/jnetpcap/jnetpcap/Latest/jnetpcap-1.4.r1425-1.linux64.x86_64.tgz
tar -xvf jnetpcap-1.4.r1425
cp jnetpcap-1.4.r1425/libjnetpcap.so /lib/
Run your program

I ran into this exception as well, and discovered that I had forgotten an installation step from RELEASE_NOTES.txt.
The library will fail to find the binaries unless they're placed in an OS default location, or Java is given some way to find them. For me, following the directions made this error go away.
It's hard to summarize it better than the source material, so I'll paste it here directly:
2) Setup native jnetpcap dynamically loadable library. This varies between
operating systems.
* On Win32 systems do only one of the following
- copy the jnetpcap.dll library file, found at root of jnetpcap's
installation directory to one of the window's system folders. This
could be \windows or \windows\system32 directory.
- add the jNetPcap's installation directory to system PATH variable. This
is the same variable used access executables and scripts.
- Tell Java VM at startup exactly where to find jnetpcap.dll by setting
a java system property 'java.library.path' such as:
c:\> java -Djava.library.path=%JNETPCAP_HOME%
- You can change working directory into the root of jnetpcap's
installation directory.
* On unix based systems, use one of the following
- add /usr/lib directory to LD_LIBRARY_PATH variable as java JRE does not
look in this directory by default
- Tell Java VM at startup exactly where to find jnetpcap.dll by setting
a java system property 'java.library.path' such as:
shell > java -Djava.library.path=$JNETPCAP_HOME
- You can change working directory into the root of jnetpcap's
installation directory.
* For further trouble shooting information, please see the following link:
(http://jnetpcap.wiki.sourceforge.net/Troubleshooting+native+library)

The solution that works for me was to see what was missing for libjnetpcap with ldd :
$ ldd libjnetpcap.so<br>
linux-vdso.so.1 => (0x00007ffe42706000)<br>
libstdc++.so.6 (0x00007f12ef2ad000)<br>
libpcap.so.0.9.4 => **not found**<br>
libc.so.6 => /lib64/libc.so.6 (0x00007f12eeefe000)<br>
libm.so.6 => /lib64/libm.so.6 (0x00007f12eec7a000)<br>
/lib64/ld-linux-x86-64.so.2 (0x00007f12ef861000)<br>
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007f12eea63000)<br>
My version of libjnetpcap.so was searching for a libpcap.so.0.9.4.
So I just made a quick link and check with ldd :
$ ln -s /usr/lib64/libpcap.so /usr/lib64/libpcap.so.0.9.4<br>
$ ldd libjnetpcap.so<br>
linux-vdso.so.1 => (0x00007ffdaadee000)<br>
libstdc++.so.6 => /usr/lib64/libstdc++.so.6 (0x00007eff8f974000)<br>
libpcap.so.0.9.4 => /usr/lib64/libpcap.so.0.9.4 (0x00007eff8f734000)<br>
libc.so.6 => /lib64/libc.so.6 (0x00007eff8f39f000)<br>
libm.so.6 => /lib64/libm.so.6 (0x00007eff8f11b000)<br>
/lib64/ld-linux-x86-64.so.2 (0x00007eff8ff42000)<br>
libgcc_s.so.1 => /lib64/libgcc_s.so.1 (0x00007eff8ef05000)<br>
Then all was good for me.

In Ubuntu, I also needed this library:
sudo apt install libpcap-dev
I also cp the files as described by #NormanSp and #user977860

1st Place your libjnetpcap.so inside /lib64
2nd Make sure your java version is 1.8.0_181 or below.

Minecraft Custom Launcher 1.7.10 no lwggl in java.library.path

I'm trying to create my custom C# minecraft launcher but I have this error.
I created a launcher.bat file first in order to solve this problem quicker.
I have this code to start minecraft:
java
-Djava.library.path=C:\Users\Davide\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.1\
-cp
C:\Users\Davide\AppData\Roaming\.minecraft\versions\1.7.10\1.7.10.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\java3d\vecmath\1.3.1\vecmath-1.3.1.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\net\sf\trove4j\trove4j\3.0.3\trove4j-3.0.3.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\com\ibm\icu\icu4j-core-mojang\51.2\icu4j-core-mojang-51.2.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\net\sf\jopt-simple\jopt-simple\4.5\jopt-simple-4.5.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\com\paulscode\codecjorbis\20101023\codecjorbis-20101023.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\com\paulscode\codecwav\20101023\codecwav-20101023.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\com\paulscode\libraryjavasound\20101123\libraryjavasound-20101123.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\com\paulscode\librarylwjglopenal\20100824\librarylwjglopenal-20100824.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\com\paulscode\soundsystem\20120107\soundsystem-20120107.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\io\netty\netty-all\4.0.10.Final\netty-all-4.0.10.Final.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\com\google\guava\guava\15.0\guava-15.0.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\org\apache\commons\commons-lang3\3.1\commons-lang3-3.1.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\commons-io\commons-io\2.4\commons-io-2.4.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput\2.0.5\jinput-2.0.5.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\net\java\jutils\jutils\1.0.0\jutils-1.0.0.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\com\google\code\gson\gson\2.2.4\gson-2.2.4.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\com\mojang\authlib\1.5.21\authlib-1.5.21.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-api\2.0-beta9\log4j-api-2.0-beta9.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\org\apache\logging\log4j\log4j-core\2.0-beta9\log4j-core-2.0-beta9.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl\2.9.1\lwjgl-2.9.1.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl_util\2.9.1\lwjgl_util-2.9.1.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.1\lwjgl-platform-2.9.1-natives-windows.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\net\java\jinput\jinput-platform\2.0.5\jinput-platform-2.0.5-natives-windows.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch\5.16\twitch-5.16.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch-platform\5.16\twitch-platform-5.16-natives-windows-64.jar;
C:\Users\Davide\AppData\Roaming\.minecraft\libraries\tv\twitch\twitch-external-platform\4.5\twitch-external-platform-4.5-natives-windows-64.jar;
net.minecraft.client.main.Main
--username MYUSERNAME
--accessToken MYACCESSTOKEN
--version 1.7.10
--gameDir C:\Users\Davide\AppData\Roaming\.minecraft
--assetsDir C:\Users\Davide\AppData\Roaming\.minecraft\assets
--userProperties {}
--uuid MYUUID
But when i start it says Exception in thread "main" java.lang.UnsatisfiedLinkError: no lwjgl in java.library.path.
I found on the internet that's a problem of this line
-Djava.library.path=C:\Users\Davide\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.1\
But I double checked the path is correct.
Thank you in advance.
EDIT
I solved this problem easily taking out this from the arguments:
-Djava.library.path=C:\Users\Davide\AppData\Roaming\.minecraft\libraries\org\lwjgl\lwjgl\lwjgl-platform\2.9.1\
And putting al the DLL's in the local folder, i can't still access them with the full path though

Ok i found the answer. I had to use the local path and not the absolute one

Error when executing a jcuda program in eclipse

I'm new with JCuda. I try to write a simple example in Eclipse on Linux. I have this error, but I haven't understand what it means. Here the code:
import jcuda.Pointer;
import jcuda.runtime.JCuda;
public class cudaTest {
public static
void main(String[] args) {
Pointer pointer = new Pointer();
JCuda.cudaMalloc(pointer, 4);
System.out.println("Pointer: " + pointer);
JCuda.cudaFree(pointer);
}
}
I add the Jcuda.jar from the Java Build Path, and edit the Native library location by selecting the extracted JCuda file.
The error is:
Error while loading native library "JCudaRuntime-linux-x86_64" with base name "JCudaRuntime"
Operating system name: Linux
Architecture : amd64
Architecture bit size: 64
Stack trace from the attempt to load the library as a resource:
java.lang.NullPointerException: No resource found with name '/lib/libJCudaRuntime-linux-x86_64.so'
at jcuda.LibUtils.loadLibraryResource(LibUtils.java:151)
at jcuda.LibUtils.loadLibrary(LibUtils.java:83)
at jcuda.runtime.JCuda.initialize(JCuda.java:303)
at jcuda.runtime.JCuda.<clinit>(JCuda.java:290)
at cudaTest.main(cudaTest.java:8)
Stack trace from the attempt to load the library as a file:
java.lang.UnsatisfiedLinkError: /home/Faith/JCuda-All-0.4.2-bin-linux-x86_64/libJCudaRuntime-linux-x86_64.so: libcudart.so.4: Ne peut ouvrir le fichier d'objet partagé: Aucun fichier ou dossier de ce type
at java.lang.ClassLoader$NativeLibrary.load(Native Method)
at java.lang.ClassLoader.loadLibrary1(ClassLoader.java:1965)
at java.lang.ClassLoader.loadLibrary0(ClassLoader.java:1890)
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1880)
at java.lang.Runtime.loadLibrary0(Runtime.java:849)
at java.lang.System.loadLibrary(System.java:1088)
at jcuda.LibUtils.loadLibrary(LibUtils.java:94)
at jcuda.runtime.JCuda.initialize(JCuda.java:303)
at jcuda.runtime.JCuda.<clinit>(JCuda.java:290)
at cudaTest.main(cudaTest.java:8)
Exception in thread "main" java.lang.UnsatisfiedLinkError: Could not load the native library
at jcuda.LibUtils.loadLibrary(LibUtils.java:129)
at jcuda.runtime.JCuda.initialize(JCuda.java:303)
at jcuda.runtime.JCuda.<clinit>(JCuda.java:290)
at cudaTest.main(cudaTest.java:8)
Could tou help me please, I'm really need the solution. Thank you in advance.

Look for libJCudaRuntime-linux-x86_64.so file in your system, and make a symoblic link to /lib/libJCudaRuntime-linux-x86_64.so OR add the path of the directory where you find it to your ldconfig

Copy the .so files to lib directory:
$ sudo cp *.so /lib/

One of the possible idea - is to give a try to my project called Mavenized JCuda
https://github.com/MysterionRise/mavenized-jcuda
It's specifically created for the purpose of not fighting against classpath and other problems. It's really easy to use it, all you need to do - is to put needed version of JCuda in pom.xml, then run mvn clean package and then mvn exec:exec.
Full HowTo is available on Github page. Feel free to ask me question about that or raise question about the project