Minecraft Forums

You need:
Text editor(Preferably Eclipse!)
MCP(Minecraft Coder Pack)
ModLoader
7Zip/Winrar

1. I assume you have set up JDK, so lets get MCP! Go to this page and extract the folder to your desktop, or any desired locations!
2. Download modloader.
3. Get a fresh minecraft bin folder(%AppData%\Roaming\.minecraft\), and put it in "MCP FOLDER\jars\". Get a fresh resources folder(%AppData%\Roaming\.minecraft\), and put it in the same location as the bin folder!
4. Open your minecraft.jar in "MCP FOLDER\jars\bin\", and drag the modloader files in there.
5. Go back to the MCP folder and run "decompile.bat". It should decompile just fine.
6. (If you get an error saying "2 Hunks out of 2 Failed", don't worry! It doesn't do anything.)

Finished!

mod_Tutorial:

package net.minecraft.src;

public class mod_Tutorial extends BaseMod{

	public static Block TutorialBlock = new Tutorial_Block1(190, 255, Material.grass).setHardness(0F).setResistance(1F).setLightValue(1.0F).setBlockName("Tutorial_Block1");



	@Override
	public void load() {
		
		ModLoader.RegisterBlock(TutorialBlock);
		TutorialBlock.blockIndexInTexture = ModLoader.addOverride("/gui/items.png", "/Tutorial/TutorialBlock.png"); /*This is NOT Needed! If you don't have it, minecraft will use the default texture!*/
		ModLoader.AddName(TutorialBlock, "Tutorial Food");
		
		ModLoader.AddRecipe(new ItemStack(TutorialBlock, 64), new Object[] {
			"#", Character.valueOf('#'), Block.dirt}); 
	}
	
	public String getVersion() {return "Modding Tutorials - By Kunii";}
}

(Optional)Change all the "Tutorial"s to your own name! (mod_Food, Block1, TestBlock, etc.)
(Optional)Change the 190 to your own item id.
(Optional)Change "/Tutorial/TutorialBlock.png" to your own picture path!

(190, 255, Material.grass)

190 = The block id. 1 - 255
255 = The texture. The

TutorialBlock.blockIndexInTexture = ModLoader.addOverride("/gui/items.png", "/Tutorial/TutorialBlock.png");

will override this texture.
Material.grass = The block material. I set it to grass material, which means it will be easier to mine with a shovel.

.setHardness(0F) = The hardness of the block. 0F = Instant break.
.setResistance(1F) = The explosion resistance. -1F = Unbreakable by explosions.
.setLightValue(1F) = The light the block emits. 1F = The level of a torch. If you go ANY higher, it will crash!
.setBlockName("Tutorial_Block1") = The name minecraft refers to when it uses it in-game.

package net.minecraft.src;

import java.util.*;

public class Tutorial_Block1 extends Block{

	protected Tutorial_Block1(int i, int j, Material material) {
		super(i, j, material);
	}

	public int quantityDropped(Random r){
		return 1;
	}
}

(Optional)Change all the "Tutorial"s to your own name! (Testmod_Block, Block1, TestBlock, etc.)
(Optional)

public int quantityDropped(Random r){return 1;}

Change the {return 1;} to how many blocks / items it will drop!

mod_Tutorial:

package net.minecraft.src;

public class mod_Tutorial extends BaseMod{

	public static final Item TutorialItem = new Tutorial_Item1(1501).setItemName("Tutorial_Item1");

	@Override
	public void load() {
		
		//TutorialItem .blockIndexInTexture = ModLoader.addOverride("/gui/items.png", "/Tutorial/TutorialItem .png"); /*This is NOT Needed! If you don't have it, minecraft will use the default texture!*/
		ModLoader.AddName(TutorialItem , "Tutorial Item");
		
		ModLoader.AddRecipe(new ItemStack(TutorialItem , 64), new Object[] {
			"##", Character.valueOf('#'), Block.dirt});
	}
	
	public String getVersion() {return "Modding Tutorials - By Kunii";}
}

The same as a block!

Tutorial_Block1:

package net.minecraft.src;

public class Tutorial_Item1 extends Item{

	protected Tutorial_Item1(int i) {
		super(i);
		maxStackSize = 64;
	}

}

Change all the 'Tutorial's to your own name.
"maxStackSize = 64;", change the 64 to the max stack size you want!

Shaped Recipe
mod_Tutorial:

@Override
	public void load() {		
		ModLoader.AddRecipe(new ItemStack(TutorialBlock, 64), new Object[] {
			"###","###","###", Character.valueOf('#'), Block.dirt}); 
	}

(TutorialBlock, 64) = Creates a stack 64 Tutorial Blocks. (TutorialBlock, -1) = Creates an infinite stack of Tutorial Blocks.

"###","###","###", Character.valueOf('#'), Block.dirt});

" ##","# #","## " = The shape of your recipe. The first (" ##"), is the top row of a crafting table. The second ("# #"), is the middle row of a crafting table. The last ("###"), is the bottom row of a crafting table. If you want spaces in the recipe, simply put a space there ("# #"," # ","# #" - This will make an X as the crafting recipe!).

Shapeless Recipe
mod_Tutorial:

@Override
	public void load() {		
		ModLoader.AddShapelessRecipe(new ItemStack(TutorialBlock, 64), new Object
			{Block.dirt,});
	}

(Optional)Change the TutorialBlock to your own block / item!
(TutorialBlock, 64) = Creates a stack 64 Tutorial Blocks. (TutorialBlock, -1) = Creates an infinite stack of Tutorial Blocks.
{Block.dirt,}); = The items / blocks you craft with. Each item / block is separated with a comma.

mod_Tutorial:

@Override
	public void load() {
		//Block
		ModLoader.AddSmelting(Block.dirt.blockID, new ItemStack(TutorialBlock, 64));
		//Item
		ModLoader.AddSmelting(Item.bone.shiftedIndex, new ItemStack(TutorialBlock, 64));
	}

Block:
Change the TutorialBlock to your own block / Item.
Change 64 to the amount you want to get.
Change ' Block.dirt.blockID ' to the block you want to smelt with.

Item:
Change the TutorialBlock to your own block / Item.
Change 64 to the amount you want to get.
Change ' Item.bone.shiftedIndex ' to the item you want to smelt with.
Change

mod_Tutorial:

package net.minecraft.src;

public class mod_Tutorial extends BaseMod{

	
	public static final Item TutorialFood = new ItemFood(1502, 4, false).setItemName("TutorialFood");


	@Override
	public void load() {
		
		TutorialFood.iconIndex = ModLoader.addOverride("/gui/items.png", "/Tutorial/TutorialFood.png"); /*This is NOT Needed! If you don't have it, minecraft will use the default texture!*/
		ModLoader.AddName(TutorialFood, "Tutorial Food");
		
		ModLoader.AddRecipe(new ItemStack(TutorialFood, 64), new Object[] {
			"##","#", Character.valueOf('#'), Block.dirt}); 
	}
	
	public String getVersion() {return "Modding Tutorials - By Kunii";}
}

Help:
(Optional)Change all the "Tutorial"s to your own name! (mod_Food, SugarFood, FoodFood, etc.)
(Optional)Change the 1502 to your own item id.
(Optional)Change "/Tutorial/TutorialFood.png" to your own picture path!

(1502, 4, false)

1502 = The item ID. 1 - 32767
4 = How many hunger bars it fills. 1 is half a hunger bar. 4 = 2 Hunger bars. 20 = 10 (Full) Hunger bars!
false = If you can feed a wolf with it. true / false.