this post was submitted on 29 Oct 2025
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Minecraft: Java Edition has been obfuscated since its release. This obfuscation meant that people couldn’t see our source code. Instead, everything was scrambled – and those who wanted to mod Java Edition had to try and piece together what every class and function in the code did.

Modding is at the heart of Java Edition – and obfuscation makes modding harder. We're excited about this change to remove obfuscation, as it should make it quicker and easier for modders to create and improve mods. Now you won’t have to untangle tricky code or deal with unclear names. What’s more, de-bugging will become more straightforward, and crash logs will actually be readable!

surprisingly fantastic and consumer friendly move from mojang, good on them

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[–] DarkAri@lemmy.blahaj.zone 3 points 1 day ago (2 children)

Nice I just got back into all the mods 10 last night

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[–] lena@gregtech.eu 5 points 1 day ago

Oh, wow. Just reading the title made me really excited about this.

I don't really care what their incentive for this was, it's a good move for the community.

I have been playing re-console mod pack lately because I prefer 4J’s version of Minecraft the most.

[–] NotSteve_@piefed.ca 8 points 1 day ago (2 children)

I'm not super familiar with Java, but does this mean Java edition is basically source available, or is it still compiled Java bytecode but with proper variable names?

[–] AkatsukiLevi@lemmy.world 12 points 1 day ago
[–] Matty_r@programming.dev 2 points 1 day ago (1 children)

You can use tools like FernFlower to help turn that bytecode into actual Java.

[–] addie@feddit.uk 1 points 1 day ago

Indeed - most Java IDEs have FernFlower built in, so it's dead easy.

Decompiled Java is surprisingly close to the original, especially compared to eg. decompiled C++; good luck with that. You get all the class, function and variable names back on the original line numbers.

What you do not get back is any comments. So you can see what and how, but not why. Admittedly, most comments are kind of useless and do not explain 'why' very well, but for weird-but-critical code they can be essential.

[–] Armok_the_bunny@lemmy.world 10 points 1 day ago (2 children)

Is that going to kill the need for the various modloaders?

[–] Truscape@lemmy.blahaj.zone 22 points 1 day ago

Modloaders also mainly exist due to the onerous terms of any mojang/minecraft API for java edition that would exist - Forge/Fabric/etc... are designed to rip open the game and then stitch it back together with the desired goodies. Anything official would probably still have strings that would bind the modders, so modders won't embrace the system wholeheartedly (similar to how datapacks can't replace mods).

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[–] Treczoks@lemmy.world 2 points 1 day ago (2 children)

Obfuscation got more and more useless, as there was a serious pressure that AFAIK even tools popped up to specifically de-obfuscate Minecraft.

[–] ricdeh@lemmy.world 6 points 1 day ago

Not only tools, Mojang themselves eventually provided obfuscation maps.

[–] JackbyDev@programming.dev 2 points 1 day ago

They've had something for quite a while now that made it so names weren't changed between releases so stuff would work better. I don't remember what it's called. Like it used to be that a new version meant figuring out everything again.

[–] neeeerrrdd@lemmy.world 2 points 1 day ago* (last edited 1 day ago) (1 children)

Would the people developing mod loaders need to completely rewrite their source code to fit this new deobfuscated minecraft?

[–] simple@piefed.social 17 points 1 day ago (1 children)

from what I understand mod loaders will need to remove the part where they deobfuscate code then translate mods. this update will break modloaders for a while but in the end it should simplify the process and make modding easier.

[–] msokiovt@lemmy.today 1 points 1 day ago

Well... my producer and I will certainly be playing versions before 1.22 then....

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