NoClassDefFoundError Vs ClassNotFoundException

1. ClassNotFoundException is a checked exception, where as NoClassDefFoundError is of type Error.

2. NoClassDefFoundError is a linkage error, thrown when a class 'A' has dependency on other class 'B', latter compilation of class A, class B changed or removed.

ClassNotFoundException may thrown while application tries to use the below methods.

     Class.forName(java.lang.String),

     ClassLoader.findSystemClass(java.lang.String),  

     ClassLoader.loadClass(java.lang.String, boolean)

Related Links

ClassNotFoundException

NoClassDefFoundError

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