Is it poosible to use .dll directly in java

I had one .dll file ,i also knew the functions in that .dll .Now my doubt was is it poosible to use that .dll in my java application.If it is possible please help me on this issue.

Yes, with a 3party tool.
There are many commercials tools, google is your friend.
There is (at least) one LGPL tool : jnative
--Marc (http://jnative.sf.net)

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How to Use DLL Function in Java Applet

Hi all,
I have been assigned a task to develop java applet. The problem is, I need to use DLL functions in my applet to read records. Could you pls anyone guide me how to interface DLL and applet to read records with sample code?
I'm using JDK 1.5.0_06 and Windows XP OS. thanx..
best rgds,
jpdbay

You will need to use Java Native Interface JNI. Ther are many posts on the subject, please search, and this is the documentation:
http://java.sun.com/j2se/1.5.0/docs/guide/jni/spec/jniTOC.html

Use .dll files in Java

hi,
i have a dll file thats present some function. i called DLL file from java . i got the some errors such as
Exception in thread "main" java.lang.UnsatisfiedLinkError: Error looking up function 'USBIsConnected': The specified procedure could not be found.
but I hope with in that DLL the function present. here i have used java 1.6 version . kindly give the ideas

You need to have a good look at the JNI documentation.
It isn't nearly as simple as you appear to think.

How to use DLL files in java?

hi!
i am working on hardware based java programming. the drivers which i have are in dll format. the manufacturers dont have a java based driver api's for the hardware. i want to invoke the dll file using a bridge between windows invironment and jvm invironment. more over i am not preferring to use native interface interface and c program to tackle this problem.
is there a way out?

Is it a COM dll? You could use JACOB. If it's not COM, there's also JNA which as I understand it, is simpler than JNI, although I've never used it
Edited by: georgemc on Aug 22, 2008 11:05 AM links not working at moment for some reason
Edited by: georgemc on Aug 22, 2008 11:10 AM

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group.set$translateX(this.translateX);
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Thanks for your reply.
But would you please elaborate on this sentence: create the fx class using Class.forName("....").newInstance()?
Indeed I implemented an interface which was extended by the javafx class, and in the main java file I need to write following codes to use this object,
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Using dll-files in Java

How can this be done?
Which classes should I use to do this?

JNI
http://java.sun.com/j2se/1.4.1/docs/guide/jni/index.html
- Chris

Calling windows dll's from Java

Is there any way to call a windows dll directly from java, without having to create a bridge dll in native code and call the bridge code through the JNI?
thanks,

No.

How to use dll in Labview ?

I compile this code to dll file with VC++2010 filename is test_dll.dll .
#include "stdafx.h"
#include <iostream>
#include <Windows.h>
using namespace std;
int main(int a){
cout << "Test dll...............\n";
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After that, I put Call Library Function node in editor and double click Call Library Function node. I browse test_dll.dll into Library name or path and set function prototype to int32_t main(int32_t a); but it show error Call Library Function Node 'test_dll.dll:main':function not found in libraly. How to use dll in Labview ? And I have more question is what is differrent from Tools -> Import -> Shared Library(.dll) and use Call Library Function node.
Solved!
Go to Solution.

The issue you are having is that LabVIEW is not capable of using C++ DLLs directly. It only handles C DLLs. This does not mean that if you you cannot use the DLL if it's compiled with the C++ compiler as opposed to the C compiler. Rather, it means that you must take extra steps in order to use it from LabVIEW. The primary issue is that of name mangling or adornment. This is discussed here: http://zone.ni.com/devzone/cda/tut/p/id/4877. Basically you need to prepend extern "C" in front of your prototypes in your header files. I would also suggest reviewing this article: https://decibel.ni.com/content/docs/DOC-14564.

Using DLL functions created with LabVIEW 6i in CVI 4.0.1

I want use SQL functions from LabVIEW 6i in LabWindows/CVI 4.0.1. Building DLL with this LabVIEW-functions was succesfull, but after using DLL in CVI project and run, error message was generated: FATAL ERROR : LABVIEW.LIB was not called from a LabVIEW process. Can you help me? In attachment are VIs and build script for this DLL.
Attachments:
DLL.ZIP ‏24 KB

The SQL toolkit appears to be an ActiveX program. Why not call the objects with activeX in CVI directly?
There are several hits for labview.lib on ni's site. Goto http://search.ni.com/?col=alldocs&layout=TechResources&ql=a
and search for labview.lib.

How can i use dlls for running rtc3?

how can i use the dll libraries to use for the rtc3 software?

amolchoudhary wrote:
can anyone please help me???
How? You provide almost no useful information.
What is rtc3?
Why do you think you have to use DLLs?
What did you try so far that hasn't worked?
What is it you want to accomplish?
You see what you ask here is just about the same as if someone would ask you to tell them what screw he needs to fix his car.
Rolf Kalbermatter
Rolf Kalbermatter
CIT Engineering Netherlands
a division of Test & Measurement Solutions

Business partner migration using lsmw direct load .

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Hi ,
Does this solution give any way to update the customer fields too ?
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How to use the direct bytebuffer in JNI? Accessing JDBC from C application.

I am working on a project to access JDBC Driver within C application. The invocation JNI is used.
To get better performance, I use the preparedStatement for dynamic sql. This need to transfer much parameter data from C to JDBC for PreparedStatement object in JVM. I think this maybe get improvements by using the new direct bytebuffer function from JDK1.4. However I cannot find an example code to get start. Could someone provide some ideas for this?
Currently, I directly call JDBC API in C application through JNI, so there is no java codes. Only c file using JNI call.
My understanding is to use the direct bytebuffer feature, I also need to have java codes to process the JDBC API call and then can share the same memory between Java and C. Please correct me if wrong.
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tzhouxian wrote:
thanks, jschell
I am trying to get the best performance for the solution, using JDBC libs in a C application. So I am considering to use the direct bytebuffer in the solution to pass parameters to JDBC and get result sets from JDBC side.
For your questions,
1. Why don't you just write the database access in C?
You mean to directly call JDBC API in C through JNI, right? My plan is to wrap the JDBC API by java and expose seldom interface to C native code, so reduce the JNI call between C and JAVA. If directly call the JDBC API call from C, the number of JNI call maybe more.
No I mean what I said. In C, no java at all, why don't you write code to access the database?
2. The database access itself is going to be slower than anything that you do in C or java.
Exactly. I just want to find each potential points to get performance improvements for the whole solution. I also did some optimization work for the database call. The goal is to get the best performance from C application to database through JDBC libs.
Then I suggest you profile it.
3. Why don't you use import/export files and the database tools? This is often significantly faster with volume processing.
Sorry, I am not very familar with some functions of JNI. Could you explain, " +Why don't you use import/export files and the database tools+"?
Nothing to do with java, jni nor C.
Major (or perhaps everything that is a real 'database') comes with additional tools. Amounst those tools will be command line tools capable of importing and exporting data from the database. In processing bulk data they will always be faster than anything you can do in JDBC.

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Bank transfer using biller direct

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Lora,
You may want to try the SAP Business One Discussion Forum to see if there are SAP Business One Partners who know of this being done at ...
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How to use dll function in JDeveloper?

I want to use function in dll to develope my application,but
I can't find how to do that in the JDeveloper document.
null

You have to use the Java Native Interface to use dlls. The JNI
tutorial at http://java.sun.com/docs/books/tutorial/native1.1/
walks you through the basics and provides a sample too.
Hope this helps.
Regards,
yinjun (guest) wrote:
: I want to use function in dll to develope my
application,but
: I can't find how to do that in the JDeveloper document.Who can
: give me an answer? Thanks a lot in advance.
null

Is it poosible to use .dll directly in java

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