I’ve been working on some program with JDK 17 and Maven and some part of it should to be written with Panama.
i’ve tried to put jextract in my Maven pom.xml dependencies and copypasted the code sample i needed, but got Excpetions.
How to install it and how to make it work when i’ll pack my program into a jar file?

The code i want to implement in my program:

import java.lang.invoke.*;
import java.nio.file.Path;
import jdk.incubator.foreign.*;

/**
 %JDK16%binjava -Dforeign.restricted=permit --add-modules jdk.incubator.foreign SetWallpaper.java A.JPG
 */
public class SetWallpaper {
    static final int SPI_SETDESKWALLPAPER  = 0x0014;
    static final int SPIF_UPDATEINIFILE    = 0x01;
    static final int SPIF_SENDCHANGE       = 0x02;
    public static void main(String[] args) throws Throwable {
        LibraryLookup user32 = LibraryLookup.ofLibrary("user32");
        MethodHandle spi = CLinker.getInstance().downcallHandle(user32.lookup("SystemParametersInfoA").get()
            // BOOL SystemParametersInfoA         (UINT uiAction,  UINT uiParam,   PVOID pvParam,       UINT fWinIni);
            , MethodType.methodType(int.class,     int.class,      int.class,      MemoryAddress.class, int.class)
            , FunctionDescriptor.of(CLinker.C_LONG,CLinker.C_LONG, CLinker.C_LONG, CLinker.C_POINTER,   CLinker.C_LONG));
    
        Path path = Path.of(args[0]).toRealPath();
    
        try (NativeScope scope = NativeScope.unboundedScope()) {
            MemorySegment img = CLinker.toCString(path.toString(), scope);
            int status = (int)spi.invokeExact(SPI_SETDESKWALLPAPER, 0, img.address(), SPIF_UPDATEINIFILE | SPIF_SENDCHANGE);
            System.out.println("Changed wallpaper to "+path+" rc="+status+(status == 0 ? " *** ERROR ***": " OK"));
        }
    }
}

Small changes needed for JDK17:

/**
%JAVA_HOME%binjava --enable-native-access=ALL-UNNAMED --add-modules jdk.incubator.foreign SetWallpaper.java A.JPG
*/
public static void main(String[] args) throws Throwable {
    System.loadLibrary("user32");
    // BOOL SystemParametersInfoA(UINT uiAction, UINT uiParam, PVOID pvParam, UINT fWinIni);
    MemoryAddress symbol = SymbolLookup.loaderLookup().lookup("SystemParametersInfoW").get();
    MethodHandle SystemParametersInfoW = CLinker.getInstance().downcallHandle(symbol
        , MethodType.methodType(int.class,     int.class,      int.class,      MemoryAddress.class, int.class)
        , FunctionDescriptor.of(CLinker.C_LONG,CLinker.C_LONG, CLinker.C_LONG, CLinker.C_POINTER,   CLinker.C_LONG));

    Path path = Path.of(args[0]).toRealPath();

    try(ResourceScope scope = ResourceScope.newConfinedScope()) {
        SegmentAllocator allocator = SegmentAllocator.arenaAllocator(scope);
        // toCString as WIDE string
        Addressable wide = allocator.allocateArray(CLinker.C_CHAR, (path+"").getBytes(StandardCharsets.UTF_16LE));
        int status = (int)SystemParametersInfoW.invokeExact(SPI_SETDESKWALLPAPER, 0, wide.address(), SPIF_UPDATEINIFILE | SPIF_SENDCHANGE);
        System.out.println("Changed wallpaper to "+path+" rc="+status+(status == 0 ? " *** ERROR ***": " OK"));
    }
}

this code is from thread: Can I change my Windows desktop wallpaper programmatically in Java/Groovy?

But i can’t install Panama

I want my jar file to be a single jar file without a whole jdk folder needed near it

i’ve tried to put jextract in my Maven pom.xml dependencies and copypasted the code sample i needed, but got Excpetions.