How do I add/delete item in chest?

I'm working on my first plug-in which is trader chest.
The idea is from TraderChest that someone bulid in hmod.
Because the original mod wasn't release for bukkit yet.
So I decide to make a simple one for every people who is waiting for it.

-The combination of 1 chest and 1 sign now is now working
-The TraderChest will not work if there are other chest placed around it, unless its one block away.
-Chest could read string from sign which sign will be use to contain some information about the selling / buying price.
-I also use BlockDamageLevel to make a switcher for chest to switch Items.


Now the question is how do I put Item into the chest's inventory?

Please help me finish it.
I will release it when it done.

 

Thank you thank you thank you for making TradeCraft on Bukkit. Please someone answer his questions so he can build this very badly needed mod.

 

I already find the answer.
The function of chest is working now, but however, there are still some bugs need to be solve.
Thanks for supporting me.
And sadly, no one want to help me here.....