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Questions and Exercises: Creating and Using Packages
Questions
Assume you have written some classes. Belatedly, you
decide they should be split into three packages, as
listed in the following table. Furthermore, assume the
classes are currently in the default package (they have
no
package statements).
Destination Packages
| Package Name |
Class Name |
mygame.server |
Server |
mygame.shared> |
Utilities |
mygame.client |
Client |
- Which line of code will you need to add to each source
file to put each class in the right package?
- To adhere to the directory structure, you will need to
create some subdirectories in the development directory
and put source files in the correct subdirectories. What
subdirectories must you create? Which subdirectory does
each source file go in?
- Do you think you'll need to make any other changes to
the source files to make them compile correctly?
If so, what?
Exercises
Download the source files as listed here.
- Implement the changes you proposed in questions 1 through 3
using the source files you just downloaded.
- Compile the revised source files. (Hint:
If you're invoking the compiler from the command line
(as opposed to using a builder), invoke the compiler from
the directory that contains the
mygame directory
you just created.)
Check your answers.
