6.3. Scope of a Declaration
The scope of a declaration is the region of the program within which the entity declared by the declaration can be referred to using a simple name, provided it is visible (§6.4.1).
A declaration is said to be in scope at a particular point in a program if and only if the declaration’s scope includes that point.
The scope of the declaration of an observable (§7.4.3) top level package is all observable compilation units (§7.3).
The declaration of a package that is not observable is never in scope. The declaration of a subpackage is never in scope.
The package java is always in scope.
The scope of a type imported by a single-type-import declaration (§7.5.1) or a type-import-on-demand declaration (§7.5.2) is all the class ...
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