Can Java use a prewritten c++ dll through JNI layer?

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Hi,
I m trying to use smart card reader to read n write data to smart card. I have a dll file from the vendor which is for c++ and they have not used it for Java.
Is it possible to use the same dll for Java using JNI layer?

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Posted 16-May-12 19:47pm

Anil Kumar 23

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TorstenH. · Answer 1 · 2012-05-17T01:00:00

Solution 1

Yes.

JNI Tutorial @ oracle.com[^]

Posted 17-May-12 1:00am

TorstenH.

Comments

Anil Kumar 23 17-May-12 8:45am

Problem is, that dll is for c++ . It does not contain functions that have same syntax required for java implementation.

lets say if i hav to use winscard.dll in java code.. hOW WILL I USE IT.. can u please provide ny sample code for dat.

TorstenH. 17-May-12 10:58am

That is why you need JNI to use the dll file.

I can not provide code - because I don't know that DLL, have never worked with and do not even know where that thingy belongs too. You will need a description of the DLL to connect to it with the JNI and will have to write the wrapper.

That is what we call software development.

CPallini · Answer 2 · 2012-05-17T01:58:00

Solution 2

Yes. Of course you have to write a JNI wrapper for the DLL.

Posted 17-May-12 1:58am

CPallini

Comments

Anil Kumar 23 17-May-12 8:45am

Problem is, that dll is for c++ . It does not contain functions that have same syntax required for java implementation.

lets say if i hav to use winscard.dll in java code.. hOW WILL I USE IT.. can u please provide ny sample code for dat.