Well. I have a Window 7 Computer and when i play some games, it says i dont have Java.Example games : Minecraft,etc
When i try to download it , it always say something like "Userappdata" Sort of Error and i tryed many ways to download java but i cant
Any Solutions?

Uninstall previous versions of java via the control panel, then try again.

Edit: actually, you don't even mention whether you really do have java, so you need to give me more details than this.

At present you should just take a look at your AppData folder somewhere in C:/Users.

Note: the appdata folder is only alterable with administrative priveleges, so if java's creating or overwriting files there you need to be installing it on an admin account.