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Questions tagged [jna]

Java Native Access (JNA) provides pure Java access to native shared libraries without the need for additional native or JNI code.

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1997 questions
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How to distinguish between scrolling up or scrolling down when using jna to listen for mouse events

This is the code that uses jna to listen for mouse events.code detail. I found that the scrolling code for the scroll wheel is 522, but I can't distinguish between up and down scrolling. Can I have a way to distinguish between sliding up and down…
bigding
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How to write interface for a go function with multi return values with JNA

I'm trying to export some Go functions and call them in Java, with JNA, but I don't know how to define the interface in Java for a Go function with multiple return values. Say the Go function is: //export generateKeys func generateKeys()…
Freewind
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Fatal error with JNA structure

I have a problem with a very simple example in jna. I would like to read and write in a structure in C with java. I compiled a very simple example in c: typedef struct { int x; } MyStruct; I created the corresponding class in java with…
scenar
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how to find type of GDI

i am beginner in win 32 api . i try use win 32 api for create an onscreen keyboard . I can give handle of window and components by click but how to realize type of these and i want set text only on text box and editable components i try to use…
Amin Arab
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native library not found in resource path

My application loads a native library (idcomm25.dll file). If I start the application from command prompt with "java -jar myapplication.jar" command, or double clicking on myapplication.jar from explorer, all is fine. If I start the application via…
ugo
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How do I pass **C.char data back to caller's buffer?

I am going to build a Go shared object binary (.DLL and .so) that passes back a string to Java. To work out the C string passing from Go I wrote this: package main /* #include */ import "C" import ( "log" "unsafe" ) //export…
Phil
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IntelliJ, JInput and the java.library.path

I'm working on a java project that uses both Jogl and JInput, and I working in IntelliJ. I'm having some issues with the application not being able to find various DLLs. I know the recommended way is to extract the DLLs to a folder and then point…
Delmania
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How to use PJSIP/PJNATH in java?

I am new to PJSIP and i am getting difficulties to use it. I need to use PJNATH for STUN implementation only in my java application. I am using Java Native Acess. I am building so files from pjnath/src/pjnath files. But getting lot of undefined…
Rashed
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JNI / JNA Unsatisfied Link, but symbol is present

i am trying to integrate a legacy system via a provided c-library "libext.so". To test JNA/JNI i want to call the "setProperty" function. objdump libext.so -t | grep setProperty 0000000000104d50 g F .text 000000000000000e…
billdoor
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jna Native.LoadLibrary does not manage to load library on server (working in local)

I use JNA to load a c++ library (.so) in a java project. I package my library inside the jar, and load it from the jar when instantiating the java class that uses it. I do all this like so: mvn install compiles the c++ code and packages the outcome…
Yvus
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Mapping forBSTR data type in JNA

in header file of DLL I need to wrap is used BSTR data type as I/O parameter. I need to create its mapping in JNA. I have found following example: class BSTR extends PointerType { public BSTR() { } public BSTR(String value) { super(new…
Flasher
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How to click on "Save" button in IE software download bar using JNA

I have a IE's download bar: I need to find a way to click on one of those buttons or get location of either of "Run", "Save" or "Cancel" I am using Java and JNA, so far code looks like this: import com.sun.jna.Native; import…
Nodir Nasirov
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Jna, random Invalid Memory Access error

I have an openvr binding which has a minor problem since a while Essentially, from time to time, whenever I free the memory of some geometric 3d model (basestation or controller) I get the Error: "java.lang.Error: Invalid memory access" This is…
elect
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Java JNA draw/paint on desktop behind icons

I'm trying to paint over an external application's window, in my case more specifically the desktop and behind all visible icons. I figured out after trial and error that you can use: WinDef.HWND desktop = User32.INSTANCE.FindWindow(null,…
Bloc97
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How can I implement a JNA interface to an LPVOID buffer?

I'm trying to implement a JNA interface to VerQueryValue from the Windows API. It has the following native signature: BOOL WINAPI VerQueryValue( __in LPCVOID pBlock, __in LPCTSTR lpSubBlock, __out LPVOID *lplpBuffer, __out PUINT…
etheros
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