run java project in ant

Question

Im trying to run my java project (two programs, server and client) in ant. This is my build.xml

<project name="myproject" default="run" basedir=".">
<description>Client Server gui project</description>

<property name="srcdirserver" location="src/src_server"/>
<property name="srcdirclient" location="src/src_client"/>
<property name="lib" location="lib"/>
<property name="build" location="build"/>
<property name="buildserver" location="build/server"/>
<property name="buildclient" location="build/client"/>
<property name="dest_server" location="dest-server"/>
<property name="dest_client" location= "dest-client"/>
<property name="examples" location="examples"/>
<property name="doc" location="doc"/>




   <!-- CLEAN -->
   <target name="clean">
      <delete dir="${build}"/>
      <delete dir="${dest_server}"/>
     <delete dir="${dest_client}"/>
   </target>

   <!-- COMPILE (Dummy)-->
   <target name="compile" depends="clean,compileserver,compileclient,jarserver,jarclient,documentation">
   </target>

   <!-- DOCUMENTATION -->
   <target name="documentation">
   <javadoc sourcepath="${srcdirserver}" destdir="${doc}" encoding="UTF-8" charset="UTF-8"></javadoc>
   </target>

   <!-- COMPILE (Server code)-->
   <target name="compileserver" depends="clean">
      <mkdir dir="${buildserver}"/>
      <javac includeantruntime="false"
             srcdir="${srcdirserver}"
             destdir="${buildserver}" 
             encoding="UTF-8"
             classpath="${src}"/>
   </target>
   <!-- COMPILE (Client code)-->
   <target name="compileclient" depends="clean">
      <mkdir dir="${buildclient}"/>
      <javac includeantruntime="false"
             srcdir="${srcdirclient}"
             destdir="${buildclient}" 
             encoding="UTF-8"
             classpath="${lib}/swt.jar:${src}"/>
   </target> 
   <!-- BUILD JAR (server) -->
    <target name="jarserver" depends="clean,compileserver">
    <mkdir dir="${dest_server}"/>
    <jar destfile="${dest_server}/myserver.jar" 
         basedir="${buildserver}">
    <manifest>
    <attribute name="Main-Class"
    value="game_server.main.Init"/>
    </manifest>
    </jar>
    <mkdir dir="${dest_server}/examples"/>
    <copy todir="${dest_server}/examples" >  
        <fileset dir="${examples}" includes="**"/>  
    </copy>
    </target>

    <!-- BUILD JAR (client) -->
    <target name="jarclient" depends="clean,compileclient">
    <mkdir dir="${dest_client}"/>
    <jar destfile="${dest_client}/myclient.jar" 
         basedir="${buildclient}">
    <manifest>
    <attribute name="Main-Class"
    value="game_client.main.Gui"/>
    <attribute name="Class-Path"
    value="lib/swt.jar"/>
    </manifest>
    </jar>
    <mkdir dir="${dest_client}"/>
    <mkdir dir="${dest_client}/lib"/>
    <copy file="${lib}/swt.jar"
    todir="${dest_client}/lib"/>
    </target>

   <!-- RUN -->
    <target name="run" depends="compile,jarserver,jarclient">
       <parallel>
           <java jar="${dest_server}/myserver.jar" dir="${dest_server}" fork="true"/>
           <java jar="${dest_client}/myclient.jar" dir="${dest_client}" fork="true"/>
       </parallel>
    </target>
</project>

Server works fine, but client with gui is compiled/archived into jar successfuly, but when i run it it throws this error: /EDIT: i found out i was using wrong swt.jar version i downloaded proper now, but still getting similar error :/

run:
     [java] OpenJDK 64-Bit Server VM warning: You have loaded library /home/blackened/.swt/lib/linux/x86_64/libswt-gtk-4332.so which might have disabled stack guard. The VM will try to fix the stack guard now.
     [java] It's highly recommended that you fix the library with 'execstack -c <libfile>', or link it with '-z noexecstack'.
     [java] Exception in thread "main" java.lang.UnsatisfiedLinkError: Could not load SWT library. Reasons: 
     [java]     no swt-gtk-4332 in java.library.path
     [java]     no swt-gtk in java.library.path
     [java]     Can't load library: /home/blackened/.swt/lib/linux/x86_64/libswt-gtk-4332.so
     [java]     Can't load library: /home/blackened/.swt/lib/linux/x86_64/libswt-gtk.so
     [java]     /home/blackened/.swt/lib/linux/x86_64/libswt-gtk-4332.so: /home/blackened/.swt/lib/linux/x86_64/libswt-gtk-4332.so: Kódovanie dát v ELF súbore nie je little-endian (Possible cause: endianness mismatch)
     [java] 
     [java]     at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source)
     [java]     at org.eclipse.swt.internal.Library.loadLibrary(Unknown Source)
     [java]     at org.eclipse.swt.internal.C.<clinit>(Unknown Source)
     [java]     at org.eclipse.swt.internal.Converter.wcsToMbcs(Unknown Source)
     [java]     at org.eclipse.swt.internal.Converter.wcsToMbcs(Unknown Source)
     [java]     at org.eclipse.swt.widgets.Display.<clinit>(Unknown Source)
     [java]     at game_client.main.Gui.open(Unknown Source)
     [java]     at game_client.main.Gui.main(Unknown Source)
     [java] Java Result: 1

Im using Fedora 18 (Spherical Cow) OS. Any suggestions are appreciated.

Answer 1

It looks to me like SWT is looking for the 32-bit version of those 2 jars, but all you have installed is the 64-bit version, judging from the x86_64 in the path.

Also, you say you're on Fedora, but it's trying to load what appear to be Windows-related jars.

The 'unsatisifed link' error is likely coming from it trying to find DLLs that aren't there, instead of the .so files it should be looking for on Linux.

This may help: http://www.eclipse.org/swt/faq.php#missingdll