echec de demarrage d'eclipse !!!?

bonjour au lancement d'eclipse une fenetre apparait avec ce message et un bouton fermer

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JVM terminated. Exit code=1
/usr/bin/java
-cp /usr/share/eclipse/startup.jar org.eclipse.core.launcher.Main
-os linux
-ws gtk
-arch x86
-showsplash /usr/share/eclipse/eclipse -showsplash 600
-exitdata /usr/share/eclipse/eclipse -exitdata c800f
-vm /usr/bin/java
-vmargs
-cp /usr/share/eclipse/startup.jar org.eclipse.core.launcher.Main

après je cliques sur fermer
et une autre fenetre apparait avec ce message

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An error has occurred.  See the log file
/home/user/.eclipse/configuration/1108118702206.log

et le fichier log contient ceci

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!SESSION 2005-02-11 09:45:02.696 -----------------------------------------------eclipse.buildId=I20041216-2000
java.fullversion=GNU libgcj 3.4.2 20041017 (Red Hat 3.4.2-6.fc3)
BootLoader constants: OS=linux, ARCH=x86, WS=gtk, NL=fr_FR
Command-line arguments:  -os linux -ws gtk -arch x86
 
!ENTRY org.eclipse.osgi 2005-02-11 09:45:02.697
!MESSAGE Startup error
!STACK 1
java.lang.NoClassDefFoundError: while resolving class: org.eclipse.core.runtime.adaptor.EclipseAdaptor
   at java.lang.VMClassLoader.resolveClass(java.lang.Class) (/usr/lib/libgcj.so.5.0.0)
   at java.lang.Class.initializeClass() (/usr/lib/libgcj.so.5.0.0)
   at java.lang.Class.forName(java.lang.String, boolean, java.lang.ClassLoader) (/usr/lib/libgcj.so.5.0.0)
   at java.lang.Class.forName(java.lang.String) (/usr/lib/libgcj.so.5.0.0)
   at org.eclipse.core.runtime.adaptor.EclipseStarter.createAdaptor() (Unknown Source)
   at org.eclipse.core.runtime.adaptor.EclipseStarter.startup(java.lang.String[], java.lang.Runnable) (Unknown Source)
   at org.eclipse.core.runtime.adaptor.EclipseStarter.run(java.lang.String[], java.lang.Runnable) (Unknown Source)
   at _Jv_CallAnyMethodA(java.lang.Object, java.lang.Class, _Jv_Method, boolean, boolean, java.lang.Class[], jvalue, jvalue, boolean) (/usr/lib/libgcj.so.5.0.0)   at _Jv_CallAnyMethodA(java.lang.Object, java.lang.Class, _Jv_Method, boolean, java.lang.Class[], java.lang.Object[]) (/usr/lib/libgcj.so.5.0.0)
   at java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[]) (/usr/lib/libgcj.so.5.0.0)
   at org.eclipse.core.launcher.Main.basicRun(java.lang.String[]) (Unknown Source)
   at org.eclipse.core.launcher.Main.run(java.lang.String[]) (Unknown Source)
   at org.eclipse.core.launcher.Main.main(java.lang.String[]) (Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.xml.sax.helpers.DefaultHandler not found in [file:/usr/share/eclipse/plugins/org.eclipse.osgi_3.1.0/core.jar, file:/usr/share/eclipse/plugins/org.eclipse.osgi_3.1.0/console.jar, file:/usr/share/eclipse/plugins/org.eclipse.osgi_3.1.0/osgi.jar, file:/usr/share/eclipse/plugins/org.eclipse.osgi_3.1.0/resolver.jar, file:/usr/share/eclipse/plugins/org.eclipse.osgi_3.1.0/defaultAdaptor.jar, file:/usr/share/eclipse/plugins/org.eclipse.osgi_3.1.0/eclipseAdaptor.jar]
   at java.net.URLClassLoader.findClass(java.lang.String) (/usr/lib/libgcj.so.5.0.0)
   at java.lang.ClassLoader.loadClass(java.lang.String, boolean) (/usr/lib/libgcj.so.5.0.0)
   at _Jv_FindClass(_Jv_Utf8Const, java.lang.ClassLoader) (/usr/lib/libgcj.so.5.0.0)
   at _Jv_ClassReader.handleClassBegin(int, int, int) (/usr/lib/libgcj.so.5.0.0)   at _Jv_ClassReader.parse() (/usr/lib/libgcj.so.5.0.0)
   at _Jv_DefineClass(java.lang.Class, byte[], int, int) (/usr/lib/libgcj.so.5.0.0)
   at java.lang.VMClassLoader.defineClass(java.lang.ClassLoader, java.lang.String, byte[], int, int, java.security.ProtectionDomain) (/usr/lib/libgcj.so.5.0.0)
   at java.lang.ClassLoader.defineClass(java.lang.String, byte[], int, int, java.security.ProtectionDomain) (/usr/lib/libgcj.so.5.0.0)
   at java.security.SecureClassLoader.defineClass(java.lang.String, byte[], int, int, java.security.CodeSource) (/usr/lib/libgcj.so.5.0.0)
   at java.net.URLClassLoader.findClass(java.lang.String) (/usr/lib/libgcj.so.5.0.0)
   at java.lang.ClassLoader.loadClass(java.lang.String, boolean) (/usr/lib/libgcj.so.5.0.0)
   at _Jv_FindClass(_Jv_Utf8Const, java.lang.ClassLoader) (/usr/lib/libgcj.so.5.0.0)
   at _Jv_PrepareCompiledClass(java.lang.Class) (/usr/lib/libgcj.so.5.0.0)
   at _Jv_WaitForState(java.lang.Class, int) (/usr/lib/libgcj.so.5.0.0)
   at java.lang.VMClassLoader.linkClass0(java.lang.Class) (/usr/lib/libgcj.so.5.0.0)
   at java.lang.VMClassLoader.resolveClass(java.lang.Class) (/usr/lib/libgcj.so.5.0.0)
   ...12 more
!SESSION Fri Feb 11 09:45:03 GMT-01:00 2005 ------------------------------------!ENTRY org.eclipse.core.launcher 4 0 fév 11, 2005 09:45:03.56
!MESSAGE Exception launching the Eclipse Platform:
!STACK
java.lang.NullPointerException
   at _Jv_CallAnyMethodA(java.lang.Object, java.lang.Class, _Jv_Method, boolean, boolean, java.lang.Class[], jvalue, jvalue, boolean) (/usr/lib/libgcj.so.5.0.0)   at _Jv_CallAnyMethodA(java.lang.Object, java.lang.Class, _Jv_Method, boolean, java.lang.Class[], java.lang.Object[]) (/usr/lib/libgcj.so.5.0.0)
   at java.lang.reflect.Method.invoke(java.lang.Object, java.lang.Object[]) (/usr/lib/libgcj.so.5.0.0)
   at org.eclipse.core.runtime.adaptor.EclipseStarter.run(java.lang.String[], java.lang.Runnable) (Unknown Source)
   at org.eclipse.core.launcher.Main.basicRun(java.lang.String[]) (Unknown Source)
   at org.eclipse.core.launcher.Main.run(java.lang.String[]) (Unknown Source)
   at gnu.gcj.runtime.FirstThread.call_main() (/usr/lib/libgcj.so.5.0.0)
   at gnu.gcj.runtime.FirstThread.run() (/usr/lib/libgcj.so.5.0.0)
   at _Jv_ThreadRun(java.lang.Thread) (/usr/lib/libgcj.so.5.0.0)
   at _Jv_RunMain(java.lang.Class, byte const, int, byte const, boolean) (/usr/lib/libgcj.so.5.0.0)
   at __libc_start_main (/lib/tls/libc-2.3.3.so)

je ne comprends pas ce qui se passe quelqu'un peut m'eclairé
:merci: