different size of jars created by ANT and batch command

[Jayashree Menon]

Hello everybody,

I have a build script which is a .cmd file as shown:

    
 cd %src_area%\ejb
 cd Budget
 cd EJB
 javac -d . *.java
 jar cvfm %jar_area%\Budget.jar META-INF\MANIFEST.MF orbi META-INF

where src_area is the src directory.

Now we are migrating this to ANT build. My build.xml script is as shown

   
 <target name="compile"> 
  <javac srcdir="${src_ejb_area}\Budget\EJB" destdir="${deploy_budget_ejb}" compiler="classic" >
  <classpath>
   <path refid="lds_classes" />
  </classpath>
  </javac>
 </target>
 
 <target name="jarring" depends="compile">
  <jar destfile="${dest}\Budget.jar">
  <metainf dir="${src_ejb_area}\Budget\EJB\META-INF" />
  <fileset dir="${deploy_budget_ejb}">
  <include name="orbi\lds\ejb\*.class" />
  </fileset>
  </jar>
 </target>

I also tried with compiler="modern".
My JAVA_HOME is set to jdk1.3

However, the .jar file created is of different sizes. The jar created with the .cmd script is 51KB and the jar created by the ANT script is 39KB. I have no clue why this is happening?

Please help.

Regards
Jayashree

[Bear Bibeault]

"Jayashree M",

There aren't many rules that you need to worry about here on the Ranch, but one that we take very seriously regards the use of proper names. Please take a look at the JavaRanch Naming Policy and adjust your display name to match it.

In particular, your display name must be a first and a last name separated by a space character, and must not be obviously fictitious.

Thanks!
bear
JavaRanch Sheriff

[Ilja Preuss]

Did you check whether the content of the both jar files is the same?

[Jayashree Menon]

I checked the differences in the jars. No any differences in the no. of files. Only the sizes of individual .class files differ and therefore the resultant .jar is of different size.

But with the JAVA_HOME being same, why is the javac task of ANT creating a different sized class file than that of a class file which is made thru the batch program javac task.

Any help would be great.

Thanks
Jayashree Menon

[Ilja Preuss]

One explanation would be that the bigger class files are compiled with debug information, the smaller without.