So, I'm modding in Intellig and using this:

 

return ReflectionHelper.getPrivateValue(SoundHandler.class, getSoundHandler(), "sndManager");

Which works fine until I try it in the actual minecraft game.  Then I get an error:

ReflectionHelper$UnableToAccessFieldException ... java.lang.NoSuchFieldException: sndManager

 

So it seems the field has changed.  How do I tell what I should use for a field that will work in minecraft and build in dev?

 

I'm building for 1.7.10-10.13.0.1207 btw.

 

You are using the deobfuscated name, so it will work in the dev environment, but in the non-dev environment, the name is deobfuscated and is changed, so that's why it doesn't work. You need to check if you in a dev environment or not, and use the appropriate name for that.

You need to use the srg name in the obfuscated version of your mod.

You can find them at C:\Users\{YOUR_USER}\.gradle\caches\minecraft\net\minecraftforge\forge\{VERSION}\srgs\mcp-srg.srg

 

So for this one I took the time to find it for you, it's 'field_147694_f'. So your code would look like:

return ReflectionHelper.getPrivateValue(SoundHandler.class, getSoundHandler(), "sndManager", "field_147694_f");

 

Also, if this method is being called frequently, consider saving the 'Field' instance somewhere, and just calling Field#get(Object) on it.

Thanks!  That works!

 

I also noticed the ReflectionHelper is overloaded to allow checking by index of field.  Was going to try and see if that works as well; might be quicker to use in the future.

Oh, looks like you can also pass an array of field names so it works in both environments (I think).  I'm learning!