com4j on Windows 64 bit

Question

I've downloaded the latest com4j jars and I'm trying to run through the most simple of their examples.

I'm on Windows 7 64 bit and using a 64 bit JVM.

When I run the command (from the com4j tutorial):

java -jar tlbimp.jar -o wsh -p test.wsh %WINDIR%\system32\wshom.ocx

I get:

Exception in thread "main" java.lang.UnsatisfiedLinkError: com4j-amd64.dll: %1 is 
not a valid Win32 application
        at java.lang.ClassLoader$NativeLibrary.load(Native Method)
        at java.lang.ClassLoader.loadLibrary0(Unknown Source)
        at java.lang.ClassLoader.loadLibrary(Unknown Source)
        at java.lang.Runtime.load0(Unknown Source)
        at java.lang.System.load(Unknown Source)
        at com4j.COM4J.loadNativeLibrary(COM4J.java:569)
        at com4j.COM4J.<clinit>(COM4J.java:522)
        at com4j.tlbimp.driver.Lib.getLibid(Lib.java:90)
        at com4j.tlbimp.driver.Driver.addLib(Driver.java:38)
        at com4j.tlbimp.driver.Main.doMain(Main.java:123)
        at com4j.tlbimp.driver.Main.main(Main.java:56)
Exception in thread "Com4J shutdown hook" java.lang.NoClassDefFoundError: Could
not initialize class com4j.COM4J
        at com4j.COM4J$3.run(COM4J.java:476)

The java code extracts "com4j-amd64.dll" next to the jar.

Solution 1

The latest version has just been released:

http://kohsuke.org/2012/04/27/com4j-updates/

https://github.com/kohsuke/com4j/downloads

Using this one solved all my problems.

Solution 2

You have two options:

1. Download and use the full latest version (located here: https://github.com/kohsuke/com4j/downloads)
2. Extract the latest com4j-amd64.dll from the most recent version
   • Download the latest version (located here: https://github.com/kohsuke/com4j/downloads).
   • Open up the com4j.jar with your favorite zip utility (read 7zip)
   • Extract com4j.jar\com4j\com4j-x64.dll to the base directory of your application
   • (optional) Register the dll using REGSVR32 <path to dll>\com4j-x64.dll

Comments

[Kong]

And I'm running with an Intel processor, is it funny the dll is "amd64"?

[technomage]

No, it's not funny. That's just a common way of referring to the 64-bit architecture intel uses (as does amd).