Install the official Oracle JDK/runtime and use that instead.: Minecraft has crashed! Install OpenJDK8 and run Minecraft et-al against thatĢ. So I think your best bet would be to either:ġ. Outside of that, the only other fix would be to update the source code for the original programs to take these changes to the Java language into account - But that's blatantly not feasible, unless you're secretly Notch, or working for Microsoft! So an alternative fix might be to download and install the official Oracle JDK/runtime. I also believe that they recommend using the Oracle JDK/runtime to run it too. I'll try to look into that for you when I get a chance.Īlso: AFAIK Minecraft is built using the official Sun/Oracle Java SDK. It's not something I've ever had to deal with before. I believe it's possible to have multiple versions of the JDK/runtime installed, but offhand - I don't know how you'd go about specifying which JDK/runtime to use for a particular application.

It's also mentioned in JEP261, which is one of the JDK Enhancement Proposals.įrom what I can see, it looks like the only fix/workaround is to install and use OpenJDK8 for Minecraft (and forge/optifine). But I don't fully understand the document, so I'm not entirely sure if this is a bug, or a deliberate 'feature'.

The OP in the thread is attempting to run a java based program in OpenJDK9 and is getting the same error as you.įrom a quick look at the document linked by the only responder to that post (see pages 32 and 33), it appears to be some kind of backwards incompatible changes that were introduced into openJDK9, which affects the main application loader class. It's a different program, but they are experiencing exactly the same error message. From a quick bit of duckduckgo-fu, I found someone with a similar problem:

Jdk for optifine