Even if you installed the bundled version, you might want to point JDeveloper to a different JDK 8 update on your system (e.g., you have 1.8.0_301 installed globally).

These libraries have hard dependencies on JDK 8’s specific behavior regarding reflection, XML processing, and security managers. Upgrading the JDK would require upgrading all these components simultaneously – something Oracle did not do for this release.

Alternatively, go to and check the Java Version field.

64-bit JDK is mandatory for modern operating systems