Minecraft Modding help

If anyone knows Java and is semifamiliar with modding it, can you interpret this error code.

== MCP v4.3 ==

> Recompiling client…

javac.exe -g -verbose -classpath “lib/;lib/*;jars/bin/minecraft.jar;jars/bin/jin

put.jar;jars/bin/lwjgl.jar;jars/bin/lwjgl_util.jar” -sourcepath src/minecraft -d

bin/minecraft src/minecraftnetminecraftclient*.java src/minecraftnetminec

raftisom*.java src/minecraftnetminecraftsrc*.java conf/patches/*.java fai

led.

Return code : 1

== ERRORS FOUND ==

srcminecraftnetminecraftsrcItemChain.java:6: invalid method declaration; re

turn type required

public ItemChain(int i)