Jdeveloper 12.2.1.4 Java Version < Direct · 2026 >

Exception in thread "main" java.lang.UnsupportedClassVersionError: oracle/jdeveloper/ide/Starter has been compiled by a more recent version of the Java Runtime (class file version 52.0), this version of the Java Runtime only recognizes class file versions up to 51.0

Cause: Using JDK 7.
Solution: Install JDK 8.

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A: 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. Exception in thread "main" java