: For JDeveloper 12.2.1.4, it is highly recommended to use JDK 1.8.0_211 or higher .
Understanding the Certified Java Version for Oracle JDeveloper 12.2.1.4
Configuring JDeveloper to use a specific JDK:
You likely updated to JDK 11 or higher in your system PATH . Go back to JDK 8 in the JAVA_HOME variable. Also, check the ide.conf file – it might have been overwritten to point to the new JDK. jdeveloper 12.2.1.4 java version
While Oracle Forms 12.2.1.4 has added limited support for Java 17 (specifically for the Standalone Launcher), the JDeveloper 12.2.1.4 IDE itself remains primarily a Java 8-based product. Stack Overflow How to Check Your Current Version
64-bit JDK is mandatory for modern operating systems
If you need a hands-on example (like building a HelloWorld ADF project in JDeveloper 12.2.1.4 with JDK 8 setup steps), just ask. : For JDeveloper 12
: While version 1.8.0_191 is the minimum requirement, using a more recent JDK 8 update (such as 1.8.0_211+) is recommended for security patches and bug fixes.
Use JDK 8u202 or earlier (the last free public update for commercial use without a subscription). Later JDK 8 updates (like 8u211+) may work but haven’t been fully tested by Oracle for this IDE version.
Many JDeveloper launch issues can be traced back to incorrect or missing JAVA_HOME configuration. Also, check the ide
: Introduces the @context element to clearly separate resource fields from item context information like links and headers.
For Linux systems, JDeveloper has been tested on Oracle Enterprise Linux versions 6, 7, and 8 (64-bit). The minimum recommended system resource on Linux is 4096 MB of RAM.
Sometimes the standard JRE is mistakenly selected instead of the JDK, resulting in compilation failures. Ensure your JAVA_HOME environment variable points to the full JDK, not just the JRE.