Hi,
I was helping a customer who needed to migrate to Oracle Database 19c but still using JDK6 and JDK 7.
Using JDK 6 and 7 to connect to Oracle Database 19c is not recommended, as Oracle Database 19c may have compatibility and security features that are best supported by later versions of the JDBC driver and Java Development Kit (JDK).
Oracle recommends using a JDK that is certified with the specific Oracle Database version you are using. Oracle Database 19c is certified with JDK 8 and later versions.
It’s advisable to use a more recent version of JDK, such as JDK 8, JDK 11, or a higher version, to ensure compatibility, security, and access to the latest features and improvements. Always refer to the Oracle documentation and certification matrix for the most up-to-date information regarding supported configurations.
https://www.oracle.com/database/technologies/faq-jdbc.html
