RE: How can I call Windows .DLL components in Java

Hi, there,
I have a wondows dll component registered on my server. I want to call this componet in my Java application(Servlet). Could you tell me the syntex or is this possible to do in this way?
TIA,
Xin

Thank you for your reply. Did you suggest using JNI? Since this DLL is a comercial component and we can not recompile or modify it, I donot know how to use it. Could you give me some more detail ?
Thank you,
Xin
You can use either of the load or loadLibrary methods
in java.lang.System. The library has to be loaded at
the very beginning of loading of the class , if the
class were to access any native method in the
library.
Hence, it shoud be in a static block.
Syntax-
static {
     try{
          System.load("C:\\x.dll");
     }catch( Exception e ) {
          System.out.println(e);

Similar Messages

How can i call forpro prg file from java

Hai friends,
I have a doubt,clear it.
how can i call forpro prg file from java file
by,
N.Vijay

Thanks to your reply,
I have some print statements in my foxpro program file.
Then i like to invoke that foxpro file from my java file
This want i want..,
by,
N.Vijay

How can i call a DLL file from labview?

Iam using a sensoray 2601 module.It is given as DLL file(S2600.DLL).How can i call this function from LabVIEW?
Please Mark the solution as accepted if your problem is solved and donate kudoes

As far as I can tell problems might occur with the call library function node if the the DLL from visual basic is actually an ActiveX dll if that is the case it seems calling the dll by using the Invoke node is the way to go.
Have a look at this
/sletten

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 can I calling LabView DLL within LabView and pass similar Data Types?

I am trying to use an Instrument Driver, which is created in LabView6.1 as a DLL. At this point I have only LabView to test this DLL. I was wondering, is there easy way to find out what sort of Parameter or Data Type I should be using.
How can I pass the following data with in LabView:
LVRefnum as Type?
LVBoolean as Type?
TD1 (a structure) as Type?
It is funny to see that I am able to create a DLL in labview but having trouble calling it within LabView. I thought, it would be easier to test the DLL within the same environment.
Basically, I am more worried about the VISA calls that are used in the driver to communicate with instrument. Because, there is no link to �VISA32.dll� in
the header file, is that handled by the LV Run-time engine? I guess more details are needed on using the LabView DLL within LabView from National Instrument Technical Support.
Attachments:
RL5000.h ‏1 KB

A LVRefNum seems to be an unsigned long data type (32bit). You can cast it
in LV then use that as a parameter to call the DLL. (an Occurrence type
seems to be a Ulong32)
When you created the DLL what was the resulting type for the LVRefNum?
Happy Holidays
"Enrique" wrote in message
news:[email protected]..
> I see...
>
> After doing some research, it seems to me that there is no easy way to
> find out the type of data, other than looking at the header file and
> have documents like Using External Code in LabVIEW handy. The
> following information is from that document:
>
> LVBoolean is an 8-bit integer. 1 if TRUE, 0 if FALSE.
>
> LabVIEW specifies file refnums using t
he LVRefNum data type, the
> exact structure of which is private to the file manager. To pass
> references to open files into or out of a CIN, convert file refnums to
> file descriptors, and convert file descriptors to file refnums using
> the functions described in Chapter 6, Function Descriptions.
>
> I know you are creating a dll in LabVIEW, but I am pretty sure the
> information applies as well and is useful. For your dll this can be
> interpreted that, rather than passing a LVRefnum, try passing the file
> descriptor.
>
> From the header file, is can be deduced that TD1 is a cluster in
> LabVIEW.
>
> You are right in saying that "more details are needed on using the
> LabView DLL within LabView from National Instrument Technical
> Support.".
>
> Enrique

How can i call a c++ function through java

Hi,
dose anyone knows how to call a C++ function in java?
Thanks.

see JNI...
basically declare a native method in your java class, then run javah on the class thus generating a *.h file. Then implement the c/c++ function. Compile the c/c++ part as a shared library, and make sure its accessible from your LD_LIBRARY_PATH env variable.
Go through the steps in the JNI docs, and things shoulde be fine... hopefully ;)

How can i call a DLL file using invoke node from labview?

I cant call a DDL function using call library function.so plz tell me how to use invoke node and call DLL using invoke node
Please Mark the solution as accepted if your problem is solved and donate kudoes

Please stay in the same thread.
- Cheers, Ed

How can we call windows application inside the bsp ...

hi,
i just want to call the exe file or execute or open outlook express inside a page...
or.. openeing a notepad..
thanks
jaideep

Check this thread..
Call a Systemcommand from BSP
how to call DLL in BSP
<i>*Reward each useful answer</i>
Raja T

How Can i Use Windows DLL in Forms 6i

I want to use DLLs registred in Windows XP
What i should i Do

Hi,
We have the same problem in our project . In this case we are upgrading from an older version of forms (3.0) to 6i. The UE worked fine in the older version, but now we get a NON ORACLE ERROR. Our DLL is written in MS-VC++ project.
We'd like to know whether , besides the common version and platform, you have also written the DLL using MS-VC++ ; otherwise please tell us .
Regards,

How can I call a DLL from Borland C++Builder that was generated by LabVIEW?

In the linking phase, the linker of Borland C++Builder echoes the message shown below:
[Linker Error] 'Test.LIB' contains invalid OMF record, type 0x21 (possibly COFF)
'Test.LIB' was generated by LabVIEW Application Builder and had been verified working well with Microsoft Visual C++

"Murray Chen" schrieb im Newsbeitrag
news:[email protected]..
> In the linking phase, the linker of Borland C++Builder echoes the
> message shown below:
>
> [Linker Error] 'Test.LIB' contains invalid OMF record, type 0x21
> (possibly COFF)
>
> 'Test.LIB' was generated by LabVIEW Application Builder and had been
> verified working well with Microsoft Visual C++
Hi Murray,
Borland C++ Builder uses a .lib format which is not equal with VC++. You
have to rebuild your .lib by using implib.
Try 'implib library.lib library.dll' to create a new .lib.
Greets
Henrik

How can I call a hsqldb procedure from Java

Hello,
I am trying to call from Java a stored procedure but I keep having exceptions!!!
In addition, I have no idea how I can get the result of the procedure !!!!
I have spent the whole day in Internet.... no luck!!
===============================================
I[b] java.lang.Exception: +updatejava.sql.SQLException: Unexpected token: # in statement [ call MODIFY_FIELD_SEPARATOR(#) ]
     at util.UtilBean.test_upd(UtilBean.java:369)
===============================================
The following procedures have been created and tested withing the database and there work.
- public static String manage_field_separator(String ifs)
-public static String manage_refresh_interval(int val)
The alias have been created:
CREATE ALIAS MODIFY_FIELD_SEPARATOR FOR "com.lucent.util.StoredProcedures.manage_field_separator";
CREATE ALIAS MODIFY_REFRESH_INTERVAL FOR "com.lucent.util.StoredProcedures.manage_frefresh_interval
My file.java contains the flollowing:
public String test_upd(String tableName, String paramValue)
                                     throws Exception
   String res="0";
   Connection conn=null;
   CallableStatement cs= null;
    try
      conn=DBConnection.DBConnect();
      String p="MODIFY_"+tableName.toUpperCase()+"("+paramValue+")";
      cs=conn.prepareCall( "{call "+p+"}");
     cs.execute();
       // Suppose to get the result res of the function!!!!
    catch (SQLException e)
     exceptionMessage="+update"+e.toString();
     System.out.println("exceptionMessage="+exceptionMessage);
     throw new Exception(exceptionMessage);
    finally
      Statement stmt=null;
      DBConnection.closeConnection(conn,stmt);
    return res;
}Obviously I am doing something wrong ..... but I don't know what!!!
Could you help me please?
THanks a lot!

Thanks for your quick response.
I need to construct the name of the procedure on the fly because I don't know the name of the table I need to modify until excecution time.
I have modified the code the following way but it still does not work!!!
I still get the exception:
java.lang.Exception: +updatejava.sql.SQLException: Unexpected token CALL, requires SELECT in statement [(call MODIFY_FIELD_SEPARATOR(?)}]
     at util.UtilBean.test_upd(UtilBean.java:380)
public String test_upd(String tableName, String paramValue)
                                     throws Exception
   String res="0";
   Connection conn=null;
   CallableStatement cs= null;
    try
      conn=DBConnection.DBConnect();
      cs=conn.prepareCall( "(call MODIFY_"+tableName.toUpperCase()+"(?)}");
     cs.setString( 1, paramValue);
     cs.execute();
       // Suppose to get the result res of the function!!!!
    catch (SQLException e)
     exceptionMessage="+update"+e.toString();
     System.out.println("exceptionMessage="+exceptionMessage);
     throw new Exception(exceptionMessage);
    finally
      Statement stmt=null;
      DBConnection.closeConnection(conn,stmt);
    return res;
}

How can i call a CGI script from java?

The subject pretty much says it all. I want to call a perl cgi script so i can read from/write to files on a server. I don't know how to sign applets and this would be the easiest way for me, if someone could please tell me.

Let me get this clear. Basically what u want to do is to just call a URL, right?
U can do it by using the following code:
import java.applet.*;
import java.net.*;
import java.io.*;
public class testhttp
public static void main(String[] args)
try
URL url = new URL ("http://../testcgi.cfm");
HttpURLConnection cxn =
(HttpURLConnection)url.openConnection();
cxn.setRequestMethod("POST");
cxn.setUseCaches(false);
cxn.setDoOutput(true);
cxn.setDoInput(true);
ByteArrayOutputStream bytes = new
ByteArrayOutputStream(400);
PrintWriter writer = new PrintWriter (bytes,true);
writer.print("application=map&release=1&items=prog1");
writer.flush();
cxn.setRequestProperty("Content-
Length",String.valueOf(bytes.size()));
cxn.setRequestProperty("Content-
Type","application/x-www-form-urlencoded");
bytes.writeTo(cxn.getOutputStream());
System.out.println(bytes);
String currentLine;
BufferedReader in = new BufferedReader (new
InputStreamReader(cxn.getInputStream(),"8859_1"));
while((currentLine = in.readLine()) != null) {
System.out.println(currentLine); }
catch(Exception e) { e.printStackTrace(); }
There is also a library called HTTP client which can be found at:
http://www.innovation.ch/java/HTTPClient/index.html
It's very simple to use and the documentation is all there, but their web server seems to be down right now.
Anyway, hope my post helps.

How can i call the Buttons which made in flash

Sir
i design some Flash buttons but it is save as .swf extension
if i save as jpg or gif then animation not working as well as
effects.
sir
how can i call the flash buttons in java plz guide me
JButton mybutton=new JButton(how can i pass swf extension button);

of course, anything's possible, but to do this means first getting a bridge from flash to javascript or com or something, and then a bridge from javascript to Java. So in short,
It's not possible.

Can LabVIEW call a DLL built with VS(2005) C++ with /CLR and Without an Entry Point

My project requires me to convert a C++ program to a DLL and having it called by LabVIEW. Due to the complexity of this C++ program (converted from fortran using f2c -C++ option), it cannot be compiled without using /clr option. I did build the application standalone (/clr), and it functioned fine. When I build it into DLL using VS2005, I was forced to use No Entry point option and without using DllMain in the C++ code. Eventually the DLL was built without error. But after I call it from LabVIEW, I was not getting calculated results as expected. I added a testing function to the C++ code of the DLL and just try to modify a parameter, it will not, but only return the input numbers. I was passing data by pointer and not by value, so I expect this parameter output be modified. I suspect that the DLL didnt get executed at all as it has no entry point specified.
Am I on the right track to approach this task, or I am heading to totally wrong direction here? I believe due to the fact that my C++ was from f2c and use vsf2c.lib and so on, the code is managed code, so that a regular DLL cannot be built from it with an entry point. How can LabVIEW call such a DLL? Am I right on that? I really need your advice here for a right approach to this problem and possible implementation "watch outs"...Thanks!
Bryan

Hi...Finally I was able to compile my code with an entry point defined and without using /clr. I can also call this DLL from LV and got back a variable from a little test function added to the DLL. But the function that was used for my main application in the DLL crashed LV and I got a pop up box from Microsoft Visual C++ Runtime Library: Runtime Error! "This application has requested the Runtime to terminate it in an unusual way, please contact the application's support team for more information". In Visual Studio I also got the following message: (I eliminated most of the "No symbols loaded" messages that are not errors but just info.) I would apprciate if someone can take to look with your more "experienced eyes", many thanks! Bryan.
'LabVIEW.exe': Loaded 'C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.2600.2180_x-ww_a84f1ff9\comctl32.dll', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\WINDOWS\system32\xpsp2res.dll', Binary was not built with debug information.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\Shared\nicont.dll', Binary was not built with debug information.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\Shared\NICONTDT.dll', Binary was not built with debug information.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\LabVIEW 8.5\resource\nitaglv.dll', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\WINDOWS\system32\lkbrow.dll', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\WINDOWS\system32\lkrealt.dll', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\LabVIEW 8.5\resource\Framework\Providers\lvdaq.mxx', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\LabVIEW 8.5\resource\Framework\Providers\lvdesktop.mxx', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\LabVIEW 8.5\resource\Framework\Providers\lvfp.mxx', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\WINDOWS\system32\mfc71.dll', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\WINDOWS\system32\MFC71ENU.DLL', Binary was not built with debug information.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\LabVIEW 8.5\vi.lib\FieldPoint\SubVIs\FPLVMgr.dll', Binary was not built with debug information.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\LabVIEW 8.5\resource\Framework\Providers\lvfprt.mxx', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\LabVIEW 8.5\resource\Framework\Providers\LvProjectProxy.mxx', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\LabVIEW 8.5\resource\Framework\Providers\LvRealTimeCoreProvider.mxx', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\LabVIEW 8.5\resource\Framework\Providers\MVEProvider.mxx', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\LabVIEW 8.5\QtCore4.dll', Binary was not built with debug information.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\LabVIEW 8.5\QtXml4.dll', Binary was not built with debug information.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\LabVIEW 8.5\QtGui4.dll', Binary was not built with debug information.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\LabVIEW 8.5\resource\Framework\Providers\mxLvProvider.mxx', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\LabVIEW 8.5\resource\Framework\Providers\nimxlcpp.mxx', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\WINDOWS\system32\nimxlc.dll', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\LabVIEW 8.5\resource\Framework\Providers\variable.mxx', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\LabVIEW 8.5\resource\Framework\lvMax.dll', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\MAX\UI Providers\FieldPoint71.dll', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\LabVIEW 8.5\resource\MathScriptParser.dll', Binary was not built with debug information.
'LabVIEW.exe': Loaded 'Z:\bli\development\projects\galfitDLL\Debug\galfitDLL.dll', Symbols loaded.
'LabVIEW.exe': Loaded 'C:\WINDOWS\WinSxS\x86_Microsoft.VC80.CRT_1fc8b3b9a1e18e3b_8.0.50727.762_x-ww_6b128700\msvcr80.dll', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\Program Files\National Instruments\LabVIEW 8.5\resource\mesa.dll', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\WINDOWS\system32\mscms.dll', No symbols loaded.
'LabVIEW.exe': Loaded 'C:\WINDOWS\system32\icm32.dll', No symbols loaded.
The thread 'Win32 Thread' (0xf94) has exited with code 0 (0x0).
The thread 'Win32 Thread' (0x90c) has exited with code 3 (0x3).
The thread 'Win32 Thread' (0xfd0) has exited with code 3 (0x3).
The thread 'Win32 Thread' (0x284) has exited with code 3 (0x3).
The thread 'Win32 Thread' (0xdac) has exited with code 3 (0x3).
The thread 'Win32 Thread' (0xa98) has exited with code 3 (0x3).
The thread 'Win32 Thread' (0x528) has exited with code 3 (0x3).
The thread 'Win32 Thread' (0x614) has exited with code 3 (0x3).
The thread 'Win32 Thread' (0xa5c) has exited with code 3 (0x3).
The thread 'Win32 Thread' (0xebc) has exited with code 3 (0x3).
The thread 'Win32 Thread' (0x5cc) has exited with code 3 (0x3).
The thread 'Win32 Thread' (0x700) has exited with code 3 (0x3).
The thread 'Win32 Thread' (0xcf0) has exited with code 3 (0x3).
The thread 'Win32 Thread' (0xc7c) has exited with code 3 (0x3).
The thread 'Win32 Thread' (0x4c8) has exited with code 3 (0x3).
The thread 'Win32 Thread' (0xa4) has exited with code 3 (0x3).
The thread 'Win32 Thread' (0x52c) has exited with code 3 (0x3).
The program '[804] LabVIEW.exe: Native' has exited with code 3 (0x3).

How can we call the method of used controller?

Hi All,
   i created two WDA Applications.( like YWDA1,YWDA2 ) . i am using the component WDA2 in WDA 1.and displaying the one view of WDA2 as popup window in WDA1 on action of one of the input element in the view of WDA1 by using the method l_window_manager->create_window_for_cmp_usage
I have a button on the view of WDA2 which has appear in the popup window...how can i call the method which has binded to that button....and where should i code that...and i need to assign selected value in the popup window to input elemetn of view WDA1
Please help me to resolve this....
Regards,
Ravi

You can not directly call view's event handler from other component.
create a method in component controller of the second component and in the button click call the component controller method. ( also make the method as interface so that you can call it from other components )
Now, you can call the interfacecontroller's method
DATA: l_ref_INTERFACECONTROLLER TYPE REF TO ZIWCI__VSTX_REBATE_REQ_WD .
l_ref_INTERFACECONTROLLER =   wd_This->wd_CpIfc_<comp usage name>( ).
l_ref_INTERFACECONTROLLER->Save_Rr(
    STATUS = '01'                       " Zvstxrrstatus
save_rr is the method of second component controller

RE: How can I call Windows .DLL components in Java

Similar Messages

Maybe you are looking for