gcj Compilation

[Reda]

On a debian distrib, i desire compiled my java classes with GCJ3.3 
libgcj.so.4.0.0 but i still have the same error

Exception in thread "main" java.awt.AWTError: Cannot load AWT toolkit: 
gnu.awt.gtk.GtkToolkit not found in [file:./, core:/]
  at java.awt.Toolkit.getDefaultToolkit() (/usr/lib/libgcj.so.4.0.0)
  at java.awt.Window.getToolkit() (/usr/lib/libgcj.so.4.0.0)
  at java.awt.Container.addImpl(java.awt.Component, java.lang.Object, 
int) (/usr/lib/libgcj.so.4.0.0)
  at java.awt.Container.add(java.awt.Component) (/usr/lib/libgcj.so.4.0.0)


Cordially