When I try opening Eclipse, a pop-up dialog states:
Failed to load the JNI shared library \"C:/JDK/bin/client/jvm.dll\"`.
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One of the easy ways to resolve it is to copy the jre folder from installed the JDK into the Eclipse installation folder. Make sure that JDK you copy from is the same architecture as your Eclipse installation.
I had to configure my machine that way, because I run both Eclipse and Appcelerator Titanium Studio on my machine. The Studio needs 32-bit Java, while Eclipse needs 64-bit.