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JNA: java.lang.Error: Invalid memory access


JNA: java.lang.Error: Invalid memory access

By : Shivani Singh
Date : November 19 2020, 12:41 AM
will help you Your return type needs to be NativeLong.
Your final argument needs to be either IntByReference or int[1].
code :
typedef void *LP_DEVICEINFO;
typedef struct _DeviceData { /* anything you want in here */ } DeviceData, *pDeviceData;
typedef struct _LP_DEVICEINFO {
    int type;
    // Fill in with device-specific information
} DEVICEINFO, *LP_DEVICEINFO;

typedef struct _DeviceDate {
    int type; // Example "common" field
    int timestamp; // device-specific information
} DeviceDate;


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NetBeans IDE 7.2.1 cannot access java.lang Fatal Error: Unable to find package java.lang in classpath or bootclasspath

NetBeans IDE 7.2.1 cannot access java.lang Fatal Error: Unable to find package java.lang in classpath or bootclasspath


By : Ahmetyusuf Günen
Date : March 29 2020, 07:55 AM
With these it helps I need help with android project inside NetBeans. I Just opened project which is created in NetBeans and I have some issues with "cannot access java.lang Fatal Error: Unable to find package java.lang in classpath or bootclasspath" This is sample of one my file which have issues: , I just found what the problem was.
C++ binary to Java gets "java.lang.Error: Invalid memory access"

C++ binary to Java gets "java.lang.Error: Invalid memory access"


By : saeed rostami
Date : March 29 2020, 07:55 AM
it helps some times So it turns out that you can't (or at least you have to do it in a different way than I did) have one class implement multiple callback interfaces. Creating explicit implementations of the different callback interfaces and assigning them to the callback fields in RazerManager solved it.
This explains why the callback in Touchpad was working but not the ones in RazerManager (Touchpad implemented one interface while RazerManager did three).
code :
public class MyClass {
  private static MyCallbackInterface myCallback;

  private MyClass() {
    myCallback = new CallbackInterface() {
      @Override
      public int callback(/* parameters */) {
        // Do stuff with data here
        return 0;
      }
    }

    nativeLib.SetCallback(myCallback);
  }
JNA: java.lang.Error: Invalid memory access - TS3 Library

JNA: java.lang.Error: Invalid memory access - TS3 Library


By : user3757769
Date : March 29 2020, 07:55 AM
I wish this help you I'm using JNA to access some dll function from Java, this dll Native Function is declared as the following: , Correct solution:
Create event interface:
code :
import com.sun.jna;

public interface ServerErrorEvent implements Callback
{
    void invoke(long serverConnectionHandlerID, String errorMessage, int error, String returnCode, String extraMessage);
}
import com.sun.jna.Structure;

public class EventsStructure extends Structure
{
    public ServerErrorEvent onServerErrorEvent;

    @SuppressWarnings("rawtypes")
    @Override
    protected List<String> getFieldOrder() 
    {
        List<String> fields = new ArrayList<String>();
        for (Field f : this.getClass().getDeclaredFields())
        {
            boolean has = false;
            for (Class<?> c : f.getType().getInterfaces())
            {
                if (c.equals(DefaultEvent.class))
                {
                    has = true;
                }
            }
            if (has)
            {
                fields.add(f.getName());
            }
        }
        return fields;
    }
}
EventsStructure eventStructure = new EventsStructure();
eventStructure.onServerErrorEvent = new ServerErrorEvent() //implement server error event
{
    @Override
    public void invoke(long serverConnectionHandlerID, String errorMessage, int error, String returnCode, String extraMessage)
    {
        System.out.println("server error");
    }
};
ts3client_initClientLib(eventStructure, null, 0, "logs", "soundbackends"); //invoke ts3client_initClientLib function from library
JNA Exception in thread "main" java.lang.Error: Invalid memory access(Unknown Source)

JNA Exception in thread "main" java.lang.Error: Invalid memory access(Unknown Source)


By : Lai The Anh
Date : March 29 2020, 07:55 AM
hop of those help? The Invalid Memory Access error results when you're trying to access native-side memory that you haven't properly allocated.
Exactly how that memory gets allocated can occur a few ways and you must hunt them down to figure out your problem... you have to peel off a few layers of the onion to get to the actual problem.
code :
int EMV_ApplicationInit(AppdefLibrary_EMVCT.EMV_HANDLE hEMV, TLV tlv_Appl, TLV tlv_AIP);
TLV tlv_Appl=new TLV();
TLV tlv_AIP=new TLV();

System.out.println(AppdefLibrary.INSTANCE.ApplicationInit(hEMV, tlv_Appl, tlv_AIP));
Xpages runtime error: 'java class java.lang.IllegalStateException: Access denied (java.lang.RuntimePermission getClassLo

Xpages runtime error: 'java class java.lang.IllegalStateException: Access denied (java.lang.RuntimePermission getClassLo


By : bayu satria
Date : March 29 2020, 07:55 AM
Does that help I am trying to call 'new XWPFDocument(inStream);' in a java class in an XPages application. The XWPFDocument class is part of the Apache POI library. However when it gets to the call to this constructor at runtime, I get the following stack trace: , Add to Domino server's jvm/lib/security/java.policy file
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