Eclipse package classes are not visible - deleting package completely - checkstyle

[compauer]

Hi,

I have got three problems:
1. I created a package and imported classes to this, but I can´t see and use this classes. If I re-import the classes, eclipse asks me, whether I want to override it. So I think, that the classes are actually there.

2. When I delete my package and want to create the same package, Eclipse gives me an Error that the packename is already in use. How can I delete packages completely? Same problem with the Java-Project. If I create the same name of Java-Project, Eclipse recommend me to create packages that are created before.

3. If I try to install Checkstyle Plug-in, eclipse gives me an Error in the middle of the installtion: "Cannot complete the install because one or more required items could not be found. Software currently installed: Shared profile....
Missing requirement: Shared profile 1.0.... (SharedProfile_epp.packe.java 1.0....) requires' org.maven.ide.eclipse [1.0..] but it could not be found."

Sorry for my english, it´s not my first language :)

[Norm]

Moved to IDE section

[compauer]

Moved to IDE section

ty for responsing my question. I will try it as soon as possible.

[Tolls]

What do you mean by "created a package"?
A package in Java is simply a namespace-like construction in which a class lives represented by a 'package' declaration at the top of a .java file, which prepends the class name, and a package structure reflected in a directory structure in the OS (or jar file).