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From: "Lu, David" <dlu@tiaa-cref.org>
To: "'ant-user@jakarta.apache.org'" <ant-user@jakarta.apache.org>
Subject: [javac] vs. sun's javac
Date: Thu, 11 Jul 2002 06:57:54 -0600
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I am running ant 1.4.1 on solaris 2.8

my question is about the javac task.

the resulting class files generated are different when using the ant [javac]
task vs. the command line javac.
one class file size is 234 bytes and the other 309.
why would this be?

i have a very simple class called Test.java and here is my build.xml:

<project name="POC" default="all" basedir=".">

  <target name="ant" depends="" >
    <exec executable="which">
        <arg line="javac" />
    </exec>
    <javac srcdir="." destdir="." verbose="true"/>
    <exec executable="javap">
        <arg line=" -classpath . Test" />
    </exec>
    <exec executable="ls">
        <arg line="-l Test.class" />
    </exec>
  </target>

  <target name="javac" depends="" >
    <exec executable="which">
        <arg line="javac" />
    </exec>
    <exec executable="javac">
        <arg line=" -verbose ./Test.java" />
    </exec>
    <exec executable="javap">
        <arg line=" -classpath . Test" />
    </exec>
    <exec executable="ls">
        <arg line="-l Test.class" />
    </exec>
  </target>

  <target name="clean">
    <delete file="./Test.class"/>
  </target>

</project>

when i run 
bash-2.03$ ant ant
Buildfile: build.xml

ant:
     [exec] /usr/local/j2sdk1_3_1_03/bin/javac
    [javac] Compiling 1 source file to /home/lud/temp
    [javac] [parsing started /home/lud/temp/Test.java]
    [javac] [parsing completed 61ms]
    [javac] [loading
/usr/local/j2sdk1_3_1_03/jre/lib/rt.jar(java/lang/Object.class)]
    [javac] [loading
/usr/local/j2sdk1_3_1_03/jre/lib/rt.jar(java/lang/String.class)]
    [javac] [loading
/usr/local/j2sdk1_3_1_03/jre/lib/rt.jar(java/util/HashMap.class)]
    [javac] [checking Test]
    [javac] [wrote /home/lud/temp/Test.class]
    [javac] [total 1227ms]
     [exec] No sourcepublic class Test extends java.lang.Object {
     [exec]     java.lang.String a;
     [exec]     int i;
     [exec]     java.util.HashMap h;
     [exec]     public Test();
     [exec]     public void f1();
     [exec] }
     [exec] -rw-r--r--   1 lud      other        234 Jul 11 08:56 Test.class

BUILD SUCCESSFUL

Total time: 3 seconds
bash-2.03$ 

when i run 
bash-2.03$ ant javac
Buildfile: build.xml

javac:
     [exec] /usr/local/j2sdk1_3_1_03/bin/javac
     [exec] [parsing started ./Test.java]
     [exec] [parsing completed 112ms]
     [exec] [loading
/usr/local/j2sdk1_3_1_03/jre/lib/rt.jar(java/lang/Object.class)]
     [exec] [loading
/usr/local/j2sdk1_3_1_03/jre/lib/rt.jar(java/lang/String.class)]
     [exec] [loading
/usr/local/j2sdk1_3_1_03/jre/lib/rt.jar(java/util/HashMap.class)]
     [exec] [checking Test]
     [exec] [wrote ./Test.class]
     [exec] [total 978ms]
     [exec] Compiled from Test.java
     [exec] public class Test extends java.lang.Object {
     [exec]     java.lang.String a;
     [exec]     int i;
     [exec]     java.util.HashMap h;
     [exec]     public Test();
     [exec]     public void f1();
     [exec] }
     [exec] -rw-r--r--   1 lud      other        309 Jul 11 08:57 Test.class

BUILD SUCCESSFUL

Total time: 3 seconds
bash-2.03$ 


these two steps give different class sizes and javap outputs!

how could this be?

thanks!

david


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