I cannot make jar2dll C# .NET Framework 4.7.2/4.8 #582

maksgranko · 2024-08-25T14:58:07Z

maksgranko
Aug 25, 2024

Hello.
I have been trying for about 2.5 days to convert a JAR to a DLL.
With old version of IKVMC (~8.1.5) it was done in 1 click.
I need to use at least version 8.4.4, however I noticed that the difficulties are the same as with version 8.10, so I decided to use it.

I have re-read a lot of things, however, there is no detailed documentation anywhere for this library.

There were attempts to import all DLLs -recurse, or with -reference from directories:
C:/\Windows\Microsoft.NET\Framework64\v4.0.30319 (I noticed that it picks this up on its own, however, I tried manually prescribing it as well)
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework.NETFramework\v4.7.2
or
C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.8
Also, I have tried to use some DLLs separately.
The most information I got was from the command:
ikvmc -target:library -debug:full -nostdlib -out:app.dll -runtime: “D:\Downloads\IKVM-core\IKVM-bin\IKVM.Runtime.dll” -r: “D:\Downloads\IKVM-core\bin\IKVM. Java.dll” -r: ‘C:C:\Program Files (x86)\Reference Assemblies\Microsoft\Framework.NETFramework\v4.7.2\mscorlib.dll’ app.jar
Conclusion:

...lots of Warning...
warning IKVMC0100: Class “javax.mail.Authenticator” not found

*** COMPILER ERROR ***

IKVM.Tools.Importer, Version=8.10.1.0, Culture=neutral, PublicKeyToken=13235d27fcbfff58
C:\Windows\Microsoft.NET\Framework64\v4.0.30319\
4.0.30319.42000 64-bit
System.NullReferenceException: Object reference does not point to an instance of the object. 
In IKVM.Runtime.AttributeHelper.GetEditorBrowsableNever() in /_/src/IKVM.Runtime/AttributeHelper.cs:line 404   
in IKVM.Runtime.RuntimeByteCodeJavaType.JavaTypeImpl.AnnotationBuilder.Link() in /_/src/IKVM.Runtime/RuntimeByteCodeJavaType.JavaTypeImpl.cs:line 1562   
in IKVM.Runtime.RuntimeByteCodeJavaType.JavaTypeImpl.FinishCore() at /_/src/IKVM.Runtime/RuntimeByteCodeJavaType.JavaTypeImpl.cs:line 1270
   in IKVM.Runtime.RuntimeByteCodeJavaType.JavaTypeImpl.Finish() at /_/src/IKVM.Runtime/RuntimeByteCodeJavaType.JavaTypeImpl.cs:line 1214
   in IKVM.Tools.Importer.RuntimeImportByteCodeJavaType.Finish() in /_/src/IKVM.Tools.Importer/RuntimeImportByteCodeJavaType.cs:line 68   
in IKVM.Runtime.RuntimeByteCodeJavaType.JavaTypeImpl.Finish() in /_/src/IKVM.Runtime/RuntimeByteCodeJavaType.JavaTypeImpl.cs:line 1160   
in IKVM.Tools.Importer.RuntimeImportByteCodeJavaType.Finish() in /_/src/IKVM.Tools.Importer/RuntimeImportByteCodeJavaType.cs:line 68   
in IKVM.Runtime.DynamicClassLoader.FinishAll() in /_/src/IKVM.Runtime/DynamicClassLoader.cs:line 414   
in IKVM.Tools.Tools.Importer.CompilerClassLoader.Compile(RuntimeContext context, StaticCompiler compiler, String runtimeAssembly, List`1 optionsList) at /_/src/IKVM.Tools.Importer/CompilerClassLoader.cs:line 2558   
in IKVM.Tools.Tools.Importer.IkvmImporterInternal.Compile(String[] args) in /_/src/IKVM.Tools.Importer/IkvmImporterInternal.cs:line 196   
In IKVM.Tools.Importer.IkvmImporterInternal.Execute(String[] args) in /_/src/IKVM.Tools.Importer/IkvmImporterInternal.cs:line 113

Otherwise, with other commands: “No Core Library”

The application itself, which I want to compile into a DLL, contains everything I need already in its package in a single JAR file.

Then, I decided to try using Visual Studio 2022.
I created a .NET Framework 4.8 Console Mode project.
I tried: Downloading NuGet packages via commands and tutorials, I also tried downloading absolutely ALL packages that are available, I tried downloading packages from the package manager.
In the end I got the error:

Exception raised: “System.TypeInitializationException” in IKVM.Java.dll
System.TypeInitializationException: “The ‘<Module>’ type initializer threw an exception.”
InternalException: Could not locate ikvm home path.

I also tried to compile in Visual Studio 2022 with x64 and with AnyCPU - the result is the same.
Based on the names, I tried: Add IKVM(JRE/JDK) folder to the project root.
I also tried adding Tools to the IKVM folder.
Based on IKVM home Path, I tried: Move IKVM to C:\Users%username%, but this also did not work.
Also, I've tried adding to PATH and to “system variables”:
D:\Downloads\IKVM-core\bin\ (JDK or JRE).
D:\Downloads\IKVM\ (Tools)
IKVM_HOME => D:\Downloads\IKVM-core\bin
JAVA_HOME => D:\Downloads\IKVM-core\bin
ikvm => D:\Downloads\IKVM\

I also tried variations with and without bin
PATH:
D:\Downloads\IKVM-core\bin
D:\Downloads\IKVM-core
D:\Downloads\IKVM
%IKVM_HOME%

Text may be distorted due to translation with DeepL
i tried compile sikulix*
in 8.1.5 he drops an error, which says about IKVM-native, in some issue someone says about 8.4.4

Who knows, let me know what I'm doing wrong.

Answered by wasabii

Aug 25, 2024

That's still not a SDK style project. We only support SDK style projects, as they've been mainstream for 6 years now.

View full answer

wasabii · 2024-08-25T15:03:56Z

wasabii
Aug 25, 2024
Maintainer

https://github.com/ikvmnet/ikvm?tab=readme-ov-file#usage

17 replies

wasabii Aug 25, 2024
Maintainer

That's not an SDK project

wasabii Aug 25, 2024
Maintainer

https://learn.microsoft.com/en-us/dotnet/core/project-sdk/overview

maksgranko Aug 25, 2024
Author

Ok, I fixed the problem with the project.
I added IkvmReference/MavenReference (swapped them around)

<?xml version="1.0" encoding="utf-8"?>
<Project ToolsVersion="15.0" xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
  <Import Project="$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props" Condition="Exists('$(MSBuildExtensionsPath)\$(MSBuildToolsVersion)\Microsoft.Common.props')" />
  <PropertyGroup>
    <Configuration Condition=" '$(Configuration)' == '' ">Debug</Configuration>
    <Platform Condition=" '$(Platform)' == '' ">AnyCPU</Platform>
    <ProjectGuid>{F763624F-915B-42C1-9A5D-E3130AAFEE23}</ProjectGuid>
    <OutputType>Library</OutputType>
    <AppDesignerFolder>Properties</AppDesignerFolder>
    <RootNamespace>Sikulix</RootNamespace>
    <AssemblyName>Sikulix</AssemblyName>
    <TargetFrameworkVersion>v4.7.2</TargetFrameworkVersion>
    <FileAlignment>512</FileAlignment>
    <Deterministic>true</Deterministic>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
    <DebugSymbols>true</DebugSymbols>
    <DebugType>full</DebugType>
    <Optimize>false</Optimize>
    <OutputPath>bin\Debug\</OutputPath>
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
  </PropertyGroup>
  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Release|AnyCPU' ">
    <DebugType>pdbonly</DebugType>
    <Optimize>true</Optimize>
    <OutputPath>bin\Release\</OutputPath>
    <DefineConstants>TRACE</DefineConstants>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>4</WarningLevel>
  </PropertyGroup>
  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x64'">
    <DebugSymbols>true</DebugSymbols>
    <OutputPath>bin\x64\Debug\</OutputPath>
    <DefineConstants>DEBUG;TRACE</DefineConstants>
    <DebugType>full</DebugType>
    <PlatformTarget>x64</PlatformTarget>
    <LangVersion>7.3</LangVersion>
    <ErrorReport>prompt</ErrorReport>
    <WarningLevel>5</WarningLevel>
  </PropertyGroup>
  <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Release|x64'">
    <OutputPath>bin\x64\Release\</OutputPath>
    <DefineConstants>TRACE</DefineConstants>
    <Optimize>true</Optimize>
    <DebugType>pdbonly</DebugType>
    <PlatformTarget>x64</PlatformTarget>
    <LangVersion>7.3</LangVersion>
    <ErrorReport>prompt</ErrorReport>
  </PropertyGroup>
  <ItemGroup>
    <Reference Include="IKVM.ByteCode, Version=9.0.0.0, Culture=neutral, PublicKeyToken=13235d27fcbfff58, processorArchitecture=MSIL">
      <HintPath>..\packages\IKVM.ByteCode.9.0.0\lib\net472\IKVM.ByteCode.dll</HintPath>
    </Reference>
    <Reference Include="IKVM.Java, Version=8.10.0.0, Culture=neutral, PublicKeyToken=13235d27fcbfff58, processorArchitecture=MSIL">
      <HintPath>..\packages\IKVM.8.10.0\lib\net472\IKVM.Java.dll</HintPath>
    </Reference>
    <Reference Include="IKVM.Runtime, Version=8.10.0.0, Culture=neutral, PublicKeyToken=13235d27fcbfff58, processorArchitecture=MSIL">
      <HintPath>..\packages\IKVM.8.10.0\lib\net472\IKVM.Runtime.dll</HintPath>
    </Reference>
    <Reference Include="Microsoft.Bcl.AsyncInterfaces, Version=8.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
      <HintPath>..\packages\Microsoft.Bcl.AsyncInterfaces.8.0.0\lib\net462\Microsoft.Bcl.AsyncInterfaces.dll</HintPath>
    </Reference>
    <Reference Include="System" />
    <Reference Include="System.Buffers, Version=4.0.3.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
      <HintPath>..\packages\System.Buffers.4.5.1\lib\net461\System.Buffers.dll</HintPath>
    </Reference>
    <Reference Include="System.Collections.Immutable, Version=8.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
      <HintPath>..\packages\System.Collections.Immutable.8.0.0\lib\net462\System.Collections.Immutable.dll</HintPath>
    </Reference>
    <Reference Include="System.Core" />
    <Reference Include="System.IO.Pipelines, Version=8.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
      <HintPath>..\packages\System.IO.Pipelines.8.0.0\lib\net462\System.IO.Pipelines.dll</HintPath>
    </Reference>
    <Reference Include="System.Memory, Version=4.0.1.2, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
      <HintPath>..\packages\System.Memory.4.5.5\lib\net461\System.Memory.dll</HintPath>
    </Reference>
    <Reference Include="System.Numerics" />
    <Reference Include="System.Numerics.Vectors, Version=4.1.4.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
      <HintPath>..\packages\System.Numerics.Vectors.4.5.0\lib\net46\System.Numerics.Vectors.dll</HintPath>
    </Reference>
    <Reference Include="System.Runtime.CompilerServices.Unsafe, Version=6.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
      <HintPath>..\packages\System.Runtime.CompilerServices.Unsafe.6.0.0\lib\net461\System.Runtime.CompilerServices.Unsafe.dll</HintPath>
    </Reference>
    <Reference Include="System.Runtime.InteropServices.RuntimeInformation, Version=4.0.1.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a, processorArchitecture=MSIL">
      <HintPath>..\packages\System.Runtime.InteropServices.RuntimeInformation.4.3.0\lib\net45\System.Runtime.InteropServices.RuntimeInformation.dll</HintPath>
      <Private>True</Private>
      <Private>True</Private>
    </Reference>
    <Reference Include="System.Text.Encodings.Web, Version=8.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
      <HintPath>..\packages\System.Text.Encodings.Web.8.0.0\lib\net462\System.Text.Encodings.Web.dll</HintPath>
    </Reference>
    <Reference Include="System.Text.Json, Version=8.0.0.4, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
      <HintPath>..\packages\System.Text.Json.8.0.4\lib\net462\System.Text.Json.dll</HintPath>
    </Reference>
    <Reference Include="System.Threading.Tasks.Extensions, Version=4.2.0.1, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
      <HintPath>..\packages\System.Threading.Tasks.Extensions.4.5.4\lib\net461\System.Threading.Tasks.Extensions.dll</HintPath>
    </Reference>
    <Reference Include="System.ValueTuple, Version=4.0.3.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51, processorArchitecture=MSIL">
      <HintPath>..\packages\System.ValueTuple.4.5.0\lib\net47\System.ValueTuple.dll</HintPath>
    </Reference>
    <Reference Include="System.Xml.Linq" />
    <Reference Include="System.Data.DataSetExtensions" />
    <Reference Include="Microsoft.CSharp" />
    <Reference Include="System.Data" />
    <Reference Include="System.Net.Http" />
    <Reference Include="System.Xml" />
  </ItemGroup>
  <ItemGroup>
    <Compile Include="Properties\AssemblyInfo.cs" />
  </ItemGroup>
  <ItemGroup>
    <None Include="app.config" />
    <None Include="ikvm.properties" />
    <None Include="packages.config" />
  </ItemGroup>
  <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
</Project>

Changes:

...
    <Reference Include="System.Xml" />
  </ItemGroup>
  <ItemGroup>
    <IkvmReference Include="sikulixapi-2.0.5-win.jar">
      <AssemblyVersion>1.0.0.0</AssemblyVersion>
      <AssemblyName>MyAssembly</AssemblyName>
      <AssemblyVersion>3.2.1.0</AssemblyVersion>
      <AssemblyFileVersion>3.0.0.0</AssemblyFileVersion>
      <DisableAutoAssemblyName>true</DisableAutoAssemblyName>
      <DisableAutoAssemblyVersion>true</DisableAutoAssemblyVersion>
      <FallbackAssemblyName>sikulixapi</FallbackAssemblyName>
      <FallbackAssemblyVersion>3.1.0.0</FallbackAssemblyVersion>
      <Compile>sikulixapi-2.0.5-win.jar</Compile>
      <Aliases>sikuli</Aliases>
      <Debug>portable</Debug>
    </IkvmReference>
  </ItemGroup>
  <ItemGroup>
    <Compile Include="Properties\AssemblyInfo.cs" />
...

and

...
    <Reference Include="System.Xml" />
  </ItemGroup>
  <ItemGroup>
    <IkvmReference Include="sikulixapi-2.0.5-win.jar">
      <AssemblyVersion>1.0.0.0</AssemblyVersion>
    </IkvmReference>
  </ItemGroup>
  <ItemGroup>
    <Compile Include="Properties\AssemblyInfo.cs" />
...

but, as a result of building the solution there is no dll or jar, also no errors.
I also tried recopying the jar and compiling with ikvmc in this directory, the error described above is still present.

wasabii Aug 25, 2024
Maintainer

That's still not a SDK style project. We only support SDK style projects, as they've been mainstream for 6 years now.

Answer selected by maksgranko

maksgranko Aug 25, 2024
Author

Thanks too much! I made it.

raravind88 Aug 27, 2024

Thanks too much! I made it.

Am new to ikvm & trying to get 'dll from jar' generated in visual studio 2022 using IkvmReference in csproj file. But dll files aren't getting generated and missing reference error is thrown during build. Could you brief on the steps for dll generation during build phase?

Furkanakguun Aug 27, 2024

I just want to simply convert .class to .dll with no references and by all the default options. I installed IKVM 8.10.1 from nuget and added my .class inside IkvmReference but still doesn't work.
Guys please explain it.

GeorgeS2019 Aug 27, 2024

@maksgranko
I do not follow what help you to solve your problem and why the problem happened in the first place

=> Just realized => .NET Framework 4.7.2/4.8 <== this is the problem

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IKVM

I cannot make jar2dll C# .NET Framework 4.7.2/4.8 #582

maksgranko Aug 25, 2024

Replies: 1 comment · 17 replies

wasabii Aug 25, 2024 Maintainer

wasabii Aug 25, 2024 Maintainer

wasabii Aug 25, 2024 Maintainer

maksgranko Aug 25, 2024 Author

wasabii Aug 25, 2024 Maintainer

maksgranko Aug 25, 2024 Author

raravind88 Aug 27, 2024

Furkanakguun Aug 27, 2024

GeorgeS2019 Aug 27, 2024

maksgranko
Aug 25, 2024

Replies: 1 comment 17 replies

wasabii
Aug 25, 2024
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wasabii Aug 25, 2024
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wasabii Aug 25, 2024
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maksgranko Aug 25, 2024
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wasabii Aug 25, 2024
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