Today I am going to teach you how to make mods. The example I will be using is changing the text where it says Minecraft Beta on the main menu. For some java tutorials, check out a java tutorial site, examine Mojang's current code, look a java support/help chat or read a book on java. I am sure some of the mod developers on here, Bukkit or Minecraft forums will be willing to help also.

This tutorial is for windows, for Mac see: www.youtube.com/watch?feature=player_embedded&v=R4fS8BLlZww and for Linux/Unix use the .sh files instead of .bin and look inside src and use your distro's textedit to change the classes instead of Eclipse.

Programs Needed:

• Eclipse: http://www.eclipse.org/downloads/packages/eclipse-ide-java-developers/indigosr1
  
• MCP (Minecraft Coders Pack): http://www.mediafire.com/?g09as6o73ls77c6
  
• Notepad++: http://notepad-plus-plus.org/
  
• A Clean Minecraft (force update)(DO NOT DELETE META-INF YET!)
  

Getting Started:

1. Open the folder that you extracted MCP to
   
2. Run cleanup.bat
   
3. Run updatemcp.bat
   
4. Open the jars folder and copy the /bin/ and /resources/ folders from your %appdata%/.minecraft folder (OPTIONAL: if you cant stand seeing errors, copy a linux vanilla Minecraft server and a server.properties there too.)
   
5. Run decompile.bat
   
6. Open the folder you extracted Eclipse to
   
7. Run Eclipse
   
8. Choose the Eclipse folder that is inside of your MCP folder as the workspace
   

Creating your first mod:

• In Eclipse, open Client>src>net.minecraft.src>GuiMainMenu.java
  
• Find where it says drawString(fontRenderer, "Minecraft Beta 1.8.1", 2, height - 10, 0xffffff);
  
• The "Minecraft Beta 1.8.1" is the text, the numbers are coordinates and the color code is the color
  
• Change this to your needs (EX. drawString(fontRenderer, "Marcusant is Cool", 2, height - 10, 0xFF0000);
  
• That example will show up on the Main Menu as Marcusant is Cool
  
• OPTIONAL: You can even add some new text by making a new line, pasting that and changing the coordinates (changing the coordinates can t
  
• Click save and exit Eclipse
  

Compiling and Adding to your game:

• In your MCP folder run recompile.bat
  
• When that is done, run reobfuscate.bat
  
• Open the reobf folder, then the minecraft folder and copy all of those into your minecraft in%appdata%/.minecraft/bin/minecraft.jar
  
• Delete the META-INF in %appdata%/.minecraft/bin/minecraft.jar
  
• Run your game and test
  
• Zip up the minecraft folder inside of the reobf and post that as your mod!
  

If this helped you at all, please up vote, favorite and follow!