Why i cant open the jar file?

[DragonITA]

Hello, i want open the Vanilla package to see the Vanilla code, but i cant see the .java files. Can someone help me? I have Minecraft 1.15.2, but in Minecraft 1.15.1 I was still able to watch the HorseEntity for example, but with the new version I can't do it anymore, strangely enough. Why? Is it only me or also other modders? And it's not only for this file, but for the whole content of the package while if I want to see for example a blockstate or something like that then I can see the content of the Json, why?

[Ugdhar]

Using Eclipse, I had to run the eclipse tasks (from the commandline) twice to get it to let me to view sources, both when originally setting up the project and when updating forge/mappings in build.gradle. Otherwise when trying to look up classes and such it would tell me source was not available. No clue why, but like I said, running the tasks once, then opening in eclipse won't let me view sources, close it down, rerun tasks again, and I can view sources.

 

This was using eclipse 2019-12.

[DragonITA]

Ok, thanks a lot!