Problem with the plugin development

Hello guys.
I have 2 little problems.. I'm new at Java and i tryed to follow the "Programming A Plugin" - Guide but i got the following two errors.

The First Error ist on every class..
In the second i dont know what i should enter.

 

solution: http://forums.bukkit.org/threads/plugin-constructor-changed-all-plugins-need-to-be-updated.530/

and the com setup is to be "com.yourname.bukkit.yourplugin

 

okay i changed everything but theres also this:

"
Multiple markers at this line
- The declared package "" does not match the expected package
"com.iam.bukkit.jpg"
- The declared package "" does not match the expected package
"com.iam.bukkit.jpg"
"

 

Java is capital sensitive.

and have you set the package? or do you have freefloating files?

where it says "SamplePlugin" you want the folder that has all your .java files in it.

 

I have done everything that was in the tutorial..
So i think i have the package..

This is the projectfolder: http://serienclub.com/jPg.rar

 

your .yml file is a little wierd. your "main:" is to be the same as your package, but in your case, with an additional .jPg at the end.

so it should be "main: com.iam.bukkit.jPg,jPg"

 

Is there anywhere a sample projektfolder because I can't get it work.. i tryed to put an .jPg at the end but it also wont work..

 

http://forums.bukkit.org/threads/getting-started-with-bukkit-and-craftbukkit.131/ <- follow this to the letter and you'l have your "sample"