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I am attempting to use a 3rd-party dll for a program I am writing in java. Unfortunately, it only has 32-bit support. When I attempt to load the dll in a 64-bit VM, I get the following error:
Can't load IA 32-bit .dll on a AMD 64-bit platform
I have tried running in a 32-bit VM, which works in eclipse, but when I export the project, I get the same error. Please help!
Sincerely, Ben
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On 64-bit Windows, a 64-bit process cannot load a 32-bit dynamic-link library (DLL). Additionally, a 32-bit process cannot load a 64-bit DLL.
Yes, you can have both x64 bit and x32 bit Java installed. They won't create conflicts with with each other, as they're tied to the type of browser you're using.
However you cannot run 64bits program if your OS and IE belong to a 32bit architecture. Also you will not be able to install programs belonging to both bits on the same laptop. This will make the 32bit Java run but will not work for 64. Was this reply helpful?
You cannot use a 32-bit DLL in a 64-bit Hotspot JVM. It won't work. And I don't know of any other 64-bit JVM that supports 32-bit DLLs.
Indeed, as Peter Lawrey points out, this is not just a JVM limitation. No mainstream operating system allows an application running in 64-bit mode to load and use a 32-bit library.
Your choices are:
I have tried running in a 32-bit VM, which works in eclipse, but when I export the project, I get the same error.
That can only mean that you are running a 32-bit JVM to run the application within Eclipse, and a 64-bit JVM to run the application outside of Eclipse. (The issue is how you run the application, not how you export it ...)
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The only way to use a 32-bit shared library from a 64-bit JVM is to run an additional 32-bit JVM and access it via RMI, JMS or some form of messaging.
Its an intrinsic limitation of 64-bit programs (not just Java) that it cannot exchange pointers with a 32-bit library.
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