Class java.lang.IllegalAccessError

java.lang.Object
   |
   +----java.lang.Throwable
           |
           +----java.lang.Error
                   |
                   +----java.lang.LinkageError
                           |
                           +----java.lang.IncompatibleClassChangeError
                                   |
                                   +----java.lang.IllegalAccessError

public class IllegalAccessError
extends IncompatibleClassChangeError

Thrown if an application attempts to access or modify a field, or to call a method that it does not have access to.

Normally, this error is caught by the compiler; this error can only occur at run time if the definition of a class has incompatibly changed.