Install a 32-bit JRE on Windows 64-bit platform

Question

I have a Windows 2008 64-bit server and I have to install a 32-bit JRE, because my Java application uses 32-bit DLLs using JNI.

Unfortunately the java.exe is installed to C:\\Windows\\SysWow64 and when I start a console window or a batch file the installed java.exe is not found. (Because cmd.exe is a 64-bit application and sees the 64-bit version of the system directory which has no java.exe )

How can I make the installed java.exe available to batch files and the command line without to much messing around with the system configuration, causing other problems or preventing future updates to the JRE?

Answer 1

Don't rely on the java.exe that's in a Windows system directory; add the bin directory of your Java runtime environment to the PATH environment variable (if that's not too much "messing around with the system configuration").

Answer 2

Known issues when you install a 32 -bit JRE on a 64- bit Windows architecture machine:

1. Online Installation and Java Update features are not applicable to 64-bit architecture
2. The public JRE installed with the 32-bit JRE is not registered. You must set the PATH environment variable to point to JAVA_HOME \\bin to register the JRE

http://www.oracle.com/technetwork/java/javase/install-windows-64-142952.html