We plan to upgrade 20Apps based on Angular(1)JS and Spring.
First, Database will upgrade from Oracle11 to 18C. OS will change from SunOs5.10 to RHEL7.x. From application perspective I have below queries -
1)While we refactor applications, Should we use JDK8 or 11. If Java8, how many years will Java8 based apps sustain without any issues.
2) Do we need to upgrade Angular1 JS to Angular2/above.( We don't need any performance or feature improvement)