The 4.0 driver introduced support for the JDBC 4.0 API, which was standard in the following environments:
: Support for Version 4.0 officially ended on March 6, 2017 . Using it today is primarily for maintenance of legacy systems. System Requirements download microsoft jdbc driver 4.0 for sql server
Release Notes - JDBC Driver for SQL Server - Microsoft Learn download microsoft jdbc driver 4.0 for sql server