Import

[Glen Iris]

Question 62 Quiz C S&B Ebook

Given the directory structure:

org
|--Robot.class
|
|--ex
......|--Pet.class
......|
......|--why
...........|--Dog.class

And the following source file:

class MyClass{
Robot r;
Pet p;
Dog d;
}

Which statements must be added for the source code to compile:

A- package org;
B- import org.*;
C- package org.*;
D- package org.ex;
E- import org.ex.*;
F- package org.ex.why;
G- package org.ex.why.Dog;

The correct answers are B,E and F.

So what I would like to know is:

1 - When we say "import org.*;" does this only import the files in the org directory and not any subdirectories?

[Govindarajan Gowrisankaran]

Yes when you import org.* only files in the org directory will be imported in to your source file and no files will be imported from the subdirectory of org.

[Glen Iris]

Thank you Govindarajan Gowrisankaran .

With regard to this question, how are you supposed to know/deduce what directory MyClass is in?

[Govindarajan Gowrisankaran]

There is no necessity to know where your MyClass has been placed. You are just creating instances of Pet, Dog and Robot classes which are in different directories and inorder to create objects you should use import statements to let the compiler know where your class files has been placed.