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ClassNotFoundException vs NoClassDefFoundError
baeldung.com/java-classnotfoundexception-and-noclassdeffounderrorYapay zekadan makale özeti
- ClassNotFoundException
- Occurs when JVM cannot find requested class on classpath
- Happens when loading classes through Class.forName() or ClassLoader.loadClass()
- Can be caused by reflection issues
- NoClassDefFoundError
- Fatal error when JVM cannot find class definition during runtime
- Occurs when class was compiled successfully but not found in classpath
- Usually happens during static block execution or class initialization
- Resolution
- Check if class or jar is available in classpath
- Verify classpath is not overridden
- Consider multiple class loaders and their compatibility
- Key Differences
- ClassNotFoundException occurs only at runtime with runtime-provided names
- NoClassDefFoundError occurs when class was present at compile time but not runtime