gcj-6-jdk-dbgsym 6.3.0-5ubuntu1 (amd64 binary) in ubuntu zesty

 GCJ is a front end to the GCC compiler which can natively compile both
 Java(tm) source and bytecode files. The compiler can also generate class
 files. Other java development tools from classpath are included in this
 package.
 .
 The package contains as well a collection of wrapper scripts and symlinks.
 It is meant to provide a Java-SDK-like interface to the GCJ tool set.