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I'm trying to run ColorOracle, a software which simulates color blindness on your monitor. It is written in Java and requires "Java 6 or 7".

I have Java 8 because I foolishly trusted Oracle and updated as they suggested. I am now unable to run the program; it claims that "the registry points to a non-existent Java Runtime".

Oracle no longer provides downloads for Java 7 or earlier, and it is difficult to go through search results and figure out which 3rd party sites are trustworthy.

Is there any way I can run this program?

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  • "the registry points to a non-existent Java Runtime". First thing to try: Find the program's registry entries and correct it to point to the Java 8 runtime location. Also, Oracle still offers Java 6 and 7 RE (etc.) in their archive.
    – Ƭᴇcʜιᴇ007
    Commented Nov 2, 2016 at 19:34
  • To add to @ Ƭᴇcʜιᴇ007 comment: you can install multiple versions of Java JRE. See stackoverflow.com/questions/271609/…
    – DrMoishe Pippik
    Commented Nov 2, 2016 at 20:41
  • Of course doing so leaves you vulnerable to exploits by the Java browser plugin sonnets to disable it if you have older versions of Java installed
    – Ramhound
    Commented Nov 2, 2016 at 23:24

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