Hi Surya,
JDK should not matter here.
You can update the ojdbc driver to a 12c version before migrating the database as the 12c driver is able to connect to 12c database.
Please note that the number in ojdbc jar file name indicate the minimum Java version it will work with.
Latest driver version available for Java 6 and Java 7 is 12.1.x.x, from 12.2 onwards it only contains drivers for Java 8 and newer.
Regards,
Holger
#Adapters-and-E-Standards#Integration-Server-and-ESB#webMethods