Standard Oracle JDK (OpenJDK is generally not supported for the installer) ⚠️ The Java 9+ Compatibility Gap
To ensure your environment remains stable, follow these steps during setup:
If you have multiple versions of Java installed, you may need to manually point JDeveloper to the correct JDK 8 path. jdeveloper 12.2.1.4 java version
Since this version of JDeveloper is bundled with Oracle WebLogic Server 12.2.1.4, it inherits the strict JDK 8 requirement of that server runtime.
Oracle JDeveloper 12.2.1.4 is the final and most stable release of the 12c family. Because JDeveloper is an Integrated Development Environment (IDE) that also includes an embedded WebLogic Server, matching it with the correct Java Development Kit (JDK) version is critical for stability, performance, and successful deployment. Standard Oracle JDK (OpenJDK is generally not supported
You may also need to check ~/.jdeveloper/12.2.1.4.0/product.conf on Linux/macOS or the AppData equivalent on Windows. 🚀 Installation Best Practices
JDeveloper 12.2.1.4 will not launch or will exhibit severe graphical and compiler errors if run on Java versions higher than 8. The certified Java version for 🛠️ Core Java
The certified Java version for 🛠️ Core Java Requirements