Web Reference: Feb 19, 2026 · This error is telling us that our class was compiled at a higher version of Java than the version with which we tried to run it. More specifically, in this case we compiled our class with Java 11 and tried to run it with Java 8. Apr 30, 2012 · This error means you're trying to load a Java "class" file that was compiled with a newer version of Java than you have installed. For example, your .class file could have been compiled for JDK 7, and you're trying to run it with JDK 6. Jan 16, 2026 · In this case, the JAR was compiled with Java 11 (class file version 55.0) but is being run with Java 8 (class file version 52.0). In this blog, we’ll demystify this error, break down its root causes, and provide step-by-step solutions to fix it.
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