Oracle JDeveloper 12.2.1.4 is a popular integrated development environment (IDE) for developing Java applications. When using JDeveloper 12.2.1.4, it's essential to ensure that you're using a compatible Java version.

The recommended Java version for JDeveloper 12.2.1.4 is Java SE 8 (JDK 1.8.0_144 or later). This is because JDeveloper 12.2.1.4 was released before Java SE 11, and some features might not be optimized for the newer Java version.