c# - jni4net failed to load DLLs in Java app -

i'm trying modify jni4net sample code mycsharpdemocalc, , make sample bridge between .net dll , java layer. here c# code:

using system; using dynamsoft.dotnet.twain;  namespace mycsharpdemocalc {     public interface icalc     {         int mysupersmartfunctionidonthaveinjava(string question);         bool isshowui();     }      public class democalc : icalc     {         private readonly random r = new random();         private dynamicdotnettwain dynamicdotnettwain;          public democalc()         {             dynamicdotnettwain = new dynamsoft.dotnet.twain.dynamicdotnettwain();         }          public int mysupersmartfunctionidonthaveinjava(string question)         {              if (question == "answer ultimate question of life, universe, , everything")             {                 return 42;             }             return r.next();         }          public bool isshowui()         {             return dynamicdotnettwain.ifshowui;         }     } } 

in order build successfully, added following references:

• system.windows.forms
• dynamicdotnettwain

then typed in command

proxygen.exe mycsharpdemocalc.dll -wd work 

to generate mycsharpdemocalc.j4n.jarand mycsharpdemocalc.j4n.dll.

now, can import dynamicdotnettwain.dll, mycsharpdemocalc.j4n.dll, jni4net.n.w64.v20-0.8.6.0.dll, jni4net.n-0.8.6.0.dll, jni4net.j-0.8.6.0.jar , mycsharpdemocalc.j4n.jar java project.

java code:

import net.sf.jni4net.bridge;  import java.io.ioexception;  import mycsharpdemocalc.democalc; import mycsharpdemocalc.icalc;  public class program {     public static void main(string arsg[]) throws ioexception {         bridge.setclrversion("v20");         bridge.init();         bridge.loadandregisterassemblyfrom(new java.io.file("dynamicdotnettwain.dll"));         bridge.loadandregisterassemblyfrom(new java.io.file("mycsharpdemocalc.j4n.dll")); // crashed          icalc calc = new democalc();         final int result = calc.mysupersmartfunctionidonthaveinjava("answer ultimate question of life, universe, , everything");          system.out.printf("answer ultimate question : " + result);         system.out.printf("if show ui : " + calc.isshowui());     } } 

when tried run application, crashed at

bridge.loadandregisterassemblyfrom(new java.io.file("mycsharpdemocalc.j4n.dll"));

exception in thread "main" system.reflection.reflectiontypeloadexception: unable load 1 or more of requested types. retrieve loaderexceptions property more information.    @ system.reflection.module._gettypesinternal(stackcrawlmark& stackmark)    @ system.reflection.assembly.gettypes()    @ net.sf.jni4net.utils.registry.registerassembly(assembly assembly, boolean bindjvm, classloader classloader)    @ net.sf.jni4net.bridge.registerassembly(assembly assembly, classloader classloader)    @ net.sf.jni4net.bridge.loadandregisterassemblyfromclassloader(file assemblyfile, classloader classloader)    @ net.sf.jni4net.bridge.loadandregisterassemblyfrom(file assemblyfile)    @ net.sf.jni4net.__bridge.loadandregisterassemblyfrom3(intptr __envp, jnilocalhandle __class, jnilocalhandle assemblyfile)     @ net.sf.jni4net.bridge.loadandregisterassemblyfrom(native method)     @ com.main.program.main(program.java:68) 

how can fix it? thanks!

the jni4net attempt load image jni4net libraries located at, workaround (afaik) copy whole libraries source directory, , compile package using copied libraries, work.