Java NullPointerException on Minecraft MCP loadup

Java NullPointerException on Minecraft MCP loadup

By : Nafis Fuad Aninda
Date : November 16 2020, 06:23 AM
it should still fix some issue Yes, of course it runs fine in your IDE. Have you noticed that it has 1.8.jar under Libraries tab? That means the "Client" in your Eclipse project is using some files(assets.*) inside 1.8.jar. The Client project in your Eclipse isn't the original Minecraft source code. It is modified a bit by MCP scripts to allow you to launch Minecraft client properly in your Eclipse. You have to copy a lot of stuffs from 1.8.jar and I am sure that Minecraft Launcher can't launch it unless you modify your exported Jar file and *.json.
If you really want to have your own Minecraft.jar, below are the correct steps. After you've done your modifications to Minecraft, save all files then close your Eclipse. In the directory(folder) which contains eclipse directory, you should fine reobfuscate.bat or reobfuscate.sh. Use the .bat version if you are Windows user, and use .sh if you are MacOS or Linux user. After you run the file, you should see some files in reobf directory. The files in the directory are obfuscated files and can be copied to Minecraft.jar directly. Now, use WinRar or other tools to open Minecraft.jar(1.8.jar). Copy all the files in reobf directory to Minecraft.jar(and replace if the file exists). After you finished these steps, you've got your own Minecraft.jar!
code :

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How to compile java files for minecraft with command prompt, separately from minecraft

How to compile java files for minecraft with command prompt, separately from minecraft

By : user26139
Date : March 29 2020, 07:55 AM
This might help you So, I'm actually coding primarily in python, but I need to do one thing in java, and having no java experience, I'm really not understanding how this works. , the minecraft.jar is almost always located in
code :
NullPointerException Minecraft MCP Forge 1.6 when adding crops?

NullPointerException Minecraft MCP Forge 1.6 when adding crops?

By : André Lima
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , I'm making a minecraft mod in Minecraft MCP Forge 1.6(not sure whether to put this in the gaming section or not) and I'm getting a NullPointerException when I load the game. , You are using an object before actually initialised it:
code :
ItemStrawberry = new ItemSeedFood(7231, 3, 0.5F, BlockStrawberry.blockID, Block.tilledField.blockID).setUnlocalizedName("itemStrawberry").setTextureName(modid + ":" + "itemStrawberry").setCreativeTab(CreativeTabs.tabFood);
BlockStrawberry = new Strawberry(1018).setUnlocalizedName("blockStrawberry");
NullPointerException when trying to set item texture - minecraft 1.8 modding

NullPointerException when trying to set item texture - minecraft 1.8 modding

By : user3599881
Date : March 29 2020, 07:55 AM
wish of those help http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/modification-development/2272349-lessons-from-my-first-mc-1-8-mod
This guy explains you have to register the item renders in the init method. I did it and it worked.
code :
public void load(FMLInitializationEvent event){
        if(event.getSide() == Side.CLIENT)
            RenderItem renderItem = Minecraft.getMinecraft().getRenderItem();
            renderItem.getItemModelMesher().register(testIngot, 0, new ModelResourceLocation(sekai.MODID + ":" + ((testItem) testIngot).getName(), "inventory"));
NullPointerException with a ticking entity Minecraft modding 1.8

NullPointerException with a ticking entity Minecraft modding 1.8

By : Avery Smith
Date : March 29 2020, 07:55 AM
To fix the issue you can do It sounds like the problem could be solved by checking if the BlockPos and the EntityPlayer are not null. If they aren't null, then run the method. If they are null, simply prevent the method from being ran.
code :
protected void onImpact(MovingObjectPosition mov) {
    LuckyPotionItems lpi = new LuckyPotionItems();
    EntityPlayer player = this.getThrower() instanceof EntityPlayer ? (EntityPlayer) this.getThrower() : null;
    if(mov.getBlockPos() != null && player != null) {
        lpi.chooseUnluckyDrink(worldObj, player, mov.getBlockPos());
Minecraft Java Minecraft.getMinecraft cannot be resolved to a type

Minecraft Java Minecraft.getMinecraft cannot be resolved to a type

By : h-hirock
Date : March 29 2020, 07:55 AM
wish of those help If you want to call the constructor of Minecraft it should look like:
code :
public Minecraft mc = new Minecraft(...);
public Minecraft mc = Minecraft.getMinecraft();
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