Allow non-static final constant values

[liach]

Yes, in Java, constant values can be non-static, and they exist in Minecraft (and are optimized by javac). Examples:
SpawnGroup.despawnStartRange
ServerLoginNetworkHandler.serverId

Technically, to generate bytecode, instead of just using getstatic to replace ldc, you might need a bit more instructions, like aload_0 and then getfield (might need to expand maxs as a result), and check to ensure the method is non-static.