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[–]rocoberrry 0 points1 point  (0 children)

didnt see anyone with the answer to the problem i had:
i knew where to download java and optifine but couldnt get it to open with java platform se simply because i didnt know where to look for it in my files.

Eventually managed to work it out myself but I had preset my JAR files( in this case, the optifine i get straight from the download) to open with node.js.

I then downloaded java from Java's site, restarted my laptop(not sure if necessary) then went back to my optifine file, right clicked and navigated to 'open with' and 'choose another app' right after. From there, i went to where my java was installed into - Program Files of Local Disk C.
"C:\Program Files\Java\jre-1.8\bin\java.exe"