libswt-gtk2-4-jni 4.9.0-1~18.04.1 (amd64 binary) in ubuntu bionic

 The Standard Widget Toolkit (SWT) is a fast and rich Java GUI toolkit.
 For platforms with existing SWT implementations it provides efficient, portable
 and fast access to native controls and user interface facilities.
 .
 This package includes legacy version of pi JNI library that uses GTK+ 2.0 as
 its native GUI back end. Set environment variable SWT_GTK3=0 before launching
 the SWT application to use it.