jars (jing.jar, trang.jar) do not adhere to the java 11 module system

[aanno]

This is because the jars share some (java class) code in the same packages. If they are used in conjunction (i.e. both) in java 11, there will be compile and/or runtime errors.

The new java 11 (or java 9) module system does not like this kind of 'split jars'. The agreed-upon long-term solution to split jars is to separate the package namespaces (i.e. each package name is only used in one distinct jar).

An alternative to separation would be merging the 2 jars into one (jingtrang.jar).