Uncomment the line (remove the # character) and provide the absolute path to your certified JDK 8 folder:
The question "What Java version does JDeveloper 12.2.1.4 use?" has a clear, authoritative answer: While later JDK 8 updates may work, they are not officially certified and can introduce subtle integration bugs. Avoid JDK 9+ entirely.
Older legacy projects must be migrated forward, as JDeveloper 12c dropped support for JDK 7 runtimes during development. Why JDK 8 is Mandatory
Using an unsupported Java version leads to critical errors, including: jdeveloper 12.2.1.4 java version
If you are starting a fresh setup or need to grab older versions of the IDE, you can find the complete download and associated installation notes directly on the Oracle JDeveloper Downloads page. For enterprise integrations, reviewing the official Oracle JDeveloper Certifications page provides detailed compatibility matrices for databases, application servers, and operating systems.
When system-wide updates modify the default JAVA_HOME , JDeveloper might fail to boot, presenting an error stating that the product requires a minimum version of 1.8 and a maximum version less than 1.9.
If you have JDK 11 also installed system-wide, Maven (embedded in JDeveloper) may pick the wrong version. Fix by setting the JAVA_HOME inside JDeveloper: Uncomment the line (remove the # character) and
Keep your JDK 8 installation updated to patch critical TLS and security vulnerabilities within the local testing environment.
Ensure you are using the 64-bit architecture of Java 8 and verify the path string inside jdev.conf has no typos. Out of Memory / Heap Space Errors
Locate the jdev.conf file in the following directory: C:\Oracle\Middleware\Oracle_Home\jdeveloper\jdev\bin Why JDK 8 is Mandatory Using an unsupported
If you want, I can:
JDeveloper 12.2.1.4 supports multiple Java versions, including: