Calling Win32 API method from Java

java winapi java-native-interface
Paul Reiners picture Paul Reiners · Mar 5, 2010 · Viewed 45.3k times · Source

I need to call some methods in Wininet.dll from a Java program.

I can find plenty of tutorials on how to call a new DLL that I create from Java, but I can't seem to find any tutorials on how to call an already existing DLL from Java.

I know this involves JNI, but how, exactly, do I do this? Do I need to call javah on Wininet.h? Where do I get a copy of Wininet.h? A pointer to an existing, detailed tutorial would be sufficient.

Answer

clyfe picture clyfe · Mar 5, 2010

  1. JNA seems the industry standard of what you want, "provides Java programs easy access to native shared libraries (DLLs on Windows) without writing anything but Java code—no JNI or native code is required"

  2. There is also Java Foreign Function Interface - example usage
    If is ok for you, you could embed the JRuby interpreter and call winapi via jruby-ffi wich is a lot easier, see here, here, and here

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