Support Request: I decompile IC2,but got errors

Dear_ICE · Jan 12th 2012

I decompile IndustrialCraft 2 ,I want to develop the addon.
But got some errors when I start minecraft with eclipse.

Caused by: java.lang.NullPointerException
at net.minecraft.src.ItemStack.<init>(ItemStack.java:31)
at net.minecraft.src.ItemStack.<init>(ItemStack.java:26)
at net.minecraft.src.ic2.common.ItemScrapbox.addDrop(ItemScrapbox.java:117)
at net.minecraft.src.ic2.common.ItemScrapbox.<init>(ItemScrapbox.java:75)
at net.minecraft.src.mod_IC2.<clinit>(mod_IC2.java:243)
... 15 more

How to solve it ?

------------------------
My English is poor , sorry.

Alblaka · Jan 12th 2012

If you can't fix NPEs by yourself, you REEEEALLY shouldn't be trying to create mods.

IC² is quite complex, probably MCP can't recompile it perfectly and will create some errors like this one. Fix them, create your mod, you can assume that a recompiled version of your mod will work fine with a original version of IC².

Player · Jan 12th 2012

Try to stick to the API which is being distributed in source form. Feel free to request additional api features if you need them.

RawCode · Jan 13th 2012

try{}catch{}expeption e{custom debug output};

mitchfizz05 · Jan 16th 2012

If MCP can't recompile IC2, how do you do it?
And if you were to make a mod to go over IC2, how would you edit the stuff that IC2 already has (you can do that for private use can't you?)

Alblaka · Jan 16th 2012

Quote from mitchfizz05

If MCP can't recompile IC2, how do you do it?

As mentioned, if you really can't do it with the API and are too lazy/ignorant to request whatever you need to be included into the API, you'll need to fix all decompilation issues within the code to make it recompileable again.

immibis · Jan 20th 2012

I've run into this problem too. It happens because the decompiler breaks the order of the initializers in mod_IC2.java.
I fixed mine a much more tedious way, but this should work too, although I haven't tried it, and I don't know if other items have the same problem as well:

Open net.minecraft.src.mod_IC2
Find a line starting with "public static Item itemScrapBox"
Change that line so all it says is
Code
```
public static Item itemScrapBox;
```
Gol to the end of the file, and scroll up until you find a line starting with "itemArmorAlloyChestplate = "

Underneath that line, add

Code

itemScrapBox = (new ItemScrapbox(getItemIdFor("itemScrapbox", 29883), 159)).setItemName("itemScrapbox");

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