remram44/java-cpp-example

Example of using C++ classes from Java. Showcases SWIG, JNA and JNI

java-cpp-example's Issues

How to run the executable

Hi, I have successfully compiled the project through cmake and make (without making any changes to the code). I can't figure out where the executable is being generated and how do I run the executable?

From some other JNI tutorials, I learned this
java -Djava.library.path=. <executable-name>
But I get the class not found error in this case

Thanks!

How to generate cpplib DLL in Windows environment?

miss jna jar files

cmake error
how to resolve it?

jna invokation problem

https://github.com/remram44/java-cpp-example/blob/master/java-jna/java/src/edu/nyu/cpptest/cpplib/MyClass.java

[root@SzfyTestServer backup]# java -Djna.debug_load=true -classpath .:jna-5.5.0.jar MyClass
Feb 12, 2020 11:33:56 AM com.sun.jna.Native extractFromResourcePath
INFO: Looking in classpath from sun.misc.Launcher$AppClassLoader@4e0e2f2a for /com/sun/jna/linux-x86-64/libjnidispatch.so
Feb 12, 2020 11:33:56 AM com.sun.jna.Native extractFromResourcePath
INFO: Found library resource at jar:file:/opt/backup/jna-5.5.0.jar!/com/sun/jna/linux-x86-64/libjnidispatch.so
Feb 12, 2020 11:33:56 AM com.sun.jna.Native extractFromResourcePath
INFO: Extracting library to /root/.cache/JNA/temp/jna15688228076106253.tmp
Feb 12, 2020 11:33:56 AM com.sun.jna.NativeLibrary loadLibrary
INFO: Looking for library '/root/cpp_test/java-cpp-example-master/cpplib/build/libcpplib.so'
Feb 12, 2020 11:33:56 AM com.sun.jna.NativeLibrary loadLibrary
INFO: Adding paths from jna.library.path: null
Feb 12, 2020 11:33:56 AM com.sun.jna.NativeLibrary loadLibrary
INFO: Trying /root/cpp_test/java-cpp-example-master/cpplib/build/libcpplib.so
Feb 12, 2020 11:33:56 AM com.sun.jna.NativeLibrary loadLibrary
INFO: Found library '/root/cpp_test/java-cpp-example-master/cpplib/build/libcpplib.so' at /root/cpp_test/java-cpp-example-master/cpplib/build/libcpplib.so
Exception in thread "main" java.lang.UnsatisfiedLinkError: Error looking up function 'MyClass': /root/cpp_test/java-cpp-example-master/cpplib/build/libcpplib.so: undefined symbol: MyClass
        at com.sun.jna.Function.<init>(Function.java:252)
        at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:594)
        at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:570)
        at com.sun.jna.NativeLibrary.getFunction(NativeLibrary.java:556)
        at com.sun.jna.Library$Handler.invoke(Library.java:243)
        at com.sun.proxy.$Proxy0.MyClass(Unknown Source)
        at MyClass.<init>(MyClass.java:23)
        at MyClass.main(MyClass.java:35)

when i test this demo it throw the exception, i wonder if 「cpplib_shared」 is casual, or can i use another name?

the second problem is if 「MyClass_」prefix is necessary?