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Java Package Access

Castor Tack
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Joined: Dec 06, 2010
Posts: 31
Hello there:

A package is used to store related classes. And a package is just like a folder.
In eclipse, I create a package "SimpleGUI" in src directory, and create another package "SimpleGUI.model". Actually, "SimpleGUI.model" is a folder "model" in .../src/SimpleGUI

So I should be able to regard everything in folder "model" as something that is also in folder "SimpleGUI". So I should also be able to regard a class in package "SimpleGUI.model" as a class in package "SimpleGUI". (Is this true?)

However, , in package "SimpleGUI", when I try to use a class that is defined in package "SimpleGUI.model", I have to import SimpleGUI.model.classname
Otherwise, type will not be able to be resolved.

Why is that? If it is true that a class in package "SimpleGUI.model" is also a class in package "SimpleGUI" (The logic is: package is folder, so "in sub-folder" means "a part of folder" means "a part of package"), "import" shouldn't be necessary.


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Wouter Oet
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Joined: Oct 25, 2008
Posts: 2700

No. If you import a package then (e.g. java.util.*) then the subpackages are not imported. You must import them separately (e.g. import java.util.concurrent.*).


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Please correct my English.
Bear Bibeault
Author and ninkuma
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Joined: Jan 10, 2002
Posts: 61764
    
  67

And Java conventions say that package names should be all lowercase.


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Castor Tack
Ranch Hand

Joined: Dec 06, 2010
Posts: 31
Okay, I'll just keep that in mind.
Thanks, guys
 
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subject: Java Package Access