Jdeveloper 12.2.1.4 Java Version [ EASY × FIX ]

Always verify your jdeveloper.conf and project compiler settings to avoid cryptic build or runtime mismatches. Last verified: Q2 2025. Based on Oracle product documentation and real-world usage.

Use WebLogic 12.2.1.4 with JDK 8 for full compatibility with JDeveloper 12.2.1.4. 4. What About JDK 11, 17, or 21? No. JDeveloper 12.2.1.4 cannot be launched using JDK 11 or later. Oracle introduced official JDK 11 support starting from JDeveloper 12.2.1.5 (and fully with 12.2.1.6+). jdeveloper 12.2.1.4 java version

Edit the jdeveloper.conf file (located in ide/bin or the domain home) and set: Always verify your jdeveloper

SetJavaHome C:\path\to\jdk1.8.0_421 Or launch from command line: Use WebLogic 12

Go to Project Properties > Compiler and change Source Compatibility to 1.8 . Error 3: "Unsupported major.minor version 52.0" at runtime Cause: Your application was compiled with Java 8 (version 52) but deployed to a Java 7 runtime.