Ant NEWBIE: Can Ant save (open) source automatically before build?

Dear Ant Experts,

In Eclipse, I have a build.xml.  Each time I run it, I'm prompted to save the (Java) source I'm currently editing.  (I always want to save it.)  I have not been able to get Eclipse to save it automatically.  Can I add something to my build.xml that will save all changed files in my ...src directory before building (even if I currently have them open in Eclipse?)

Here is my build.xml:

<?xml version="1.0"?>
<project name="project" default="copy">
      <property name="outputDir" value="C:\FTG\Projects\Total\classes" />
      <property name="sourceDir" value="C:\FTG\Projects\Total\src" />
      <property name="libsDir" value="C:\FTG\Projects\Total_Libraries" />
     <target name="build">
          <path id="mypath">
               <fileset dir="C:\FTG\Projects\Total_Libraries" id="id">
                    <include name="**/*.jar" />
               </fileset>
          </path>
          <javac srcdir="${sourceDir}" destdir="classes" classpathref="mypath" includes="*.java">
          </javac>
     </target>
    <target name="copy" depends="build" >
          <copy todir="\\Ftgds\Program Files\MyCompany\Total\j2re1.4.1_03\bin">
        <fileset dir=".\classes"/>
      </copy>
      <copy todir="C:\Program Files\MyCompany\Total\j2re1.4.1_03\bin">
    <fileset dir=".\classes"/>
  </copy>
    </target>
</project>


Thanks,
BrianMc1958