Re: Directory Structure for java

From:
Robert Klemme <shortcutter@googlemail.com>
Newsgroups:
comp.lang.java.programmer
Date:
Mon, 01 Jun 2009 14:25:26 +0200
Message-ID:
<78hvlkF1lma69U1@mid.individual.net>
On 01.06.2009 13:03, Dan Smithers wrote:

Hi,

I have inherited a Java project and would like to introduce a bit more
structure. I am C++ programmer and would like to know what is considered
good practice for Java.

It is compiled on Windows using a batch file that calls

javac -O -g -deprecation *.java

This litters the directories with .class files that are then converted
into a jar with another batch file that contains

zip-r %1.jar . -i \*.class\* \*.gif \*.wav \*jpg \*.png

Currently there is a directory structure

project - contains .java files
  com
    astra
      control - contains .java files
      gui - contains .java files
      utils - contains .java files
  icons - contains .png files
     JPEGS - contains .jpg file

All the sub-packages are compiled into one jar.

Is it a good idea to zip sub-packages as separate jars and then link
them together? There are other projects that could use these packages
and it would simplify maintenance.


If these are self contained components you could do that. This totally
depends on the contents of those directories. If the code only works as
a whole then there is no point in splitting this up package wise.

I would also like to add a build directory to reduce clutter in the
source directory, but when I try it I get a null pointer exception
accessing the icons directories.

I am compiling this as

javac -O -g -deprecation -d build *.java

and running from the project directory using

java -cp build VTASystem

thanks for your help


The first thing I'd probably do would be to replace the batch based
build with an ant based build - at least for the Java part. With ant
you can fairly easy do all those tasks like compilation, copying of
resources (image files and the like), building jars etc. The nice
benefit is that via ant's task and dependency system you can rebuild
only those parts which must be rebuild to incorporate changes since the
last build.

http://ant.apache.org/

Kind regards

    robert

--
remember.guy do |as, often| as.you_can - without end
http://blog.rubybestpractices.com/

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