Hi.

I need to use a program that specifically requires the old Oracle Java 8 as JRE. The problem is, that it is not available in my distribution's (Gentoo) repository any more, so I can't install it the normal way. The only option I have is downloading the official JRE tarball from java.com and copy its contents somewhere in my home directory.

Let's assume the install path for JRE will be:
And the path of the old Java program is:
The question is: How can I set this JRE as the default JRE for my current user, so that it works just the same as if it were installed using the package manager (from my user account's perspective)? I don't care about system-wide availability, I only need it for my own user account to run this one old java app. I don't have other JRE installed on the system.

Thanks in advance for your help.

If prefixing the java binary's location to your path isn't enough, set the JAVA_HOME environment variable too.

Hi.

Thanks for the reply. I figured out the path part, but didn't know about JAVA_HOME. It sort of works now, but only if I start the program from the command line. It should suffice for now, as I only need to use this program very rarely (fortunately).

Marking the thread as solved.