Is there any plan to develop a JDBC driver parallel to the ODBC driver?
There are no current plans to develop a JDBC driver.
There are products out there that allow you to use a ODBC driver with JDBC called JDBC_ODBC bridges. Here is one (https://www.easysoft.com/products/data_access/jdbc_odbc_bridge/#section=tab-1).
Another option would be to invoke the PXPSQL command line client from within java and read back the results.