| The fully qualified name of CL is p.p0.CL |
| All classes in the standard packages java and javax are implicitly imported. |
| All classes of the package java.lang are implicitly imported. |
| The package statement has to be the first line of a java file. |
| The fully qualified name of CL is p0.p.CL |
| A class can be used by its fully qualified name without an import statement. |
| To use a class which is in a package, you must import the class or the entire package. |
| CL must either be stored in a folder subtree p0->p->CL.java, or contain a package statement. |
| If a class is not in the classpath, an import statement is required in order to use the class. |
| Import has no runtime semenatics; it only allows using classes by their class names instead of their fully qualified names. |