classpath-gtkpeer 2:0.98-5ubuntu3 (amd64 binary) in ubuntu lucid

 GNU classpath provides a free replacement for Sun's proprietary class
 libraries so that the GNU system can run programs written in the Java
 language.
 .
 GNU Classpath makes it possible to compile DFSG-free programs written
 in the Java language without depending on proprietary class libraries.
 .
 GNU Classpath can be used to run Java applications without depending on
 proprietary software.
 .
 This package contains the GTK+ AWT peer to run GUI applications.