Difference between IllegalAccessError and IllegalAccessException

Question

Consider this pair of Throwable:

IllegalAccessExceptionextends Exception

Thrown when an application tries to reflectively cr

Answer 1

There are several pairs of Exception/Error in java.lang, and all of the following deal with reflective vs. direct usage:

IllegalAccessException / IllegalAccessError
InstantiationException / InstantiationError
ClassNotFoundException / NoClassDefFoundError
NoSuchFieldException / NoSuchFieldError
NoSuchMethodException / NoSuchMethodError

Other examples are:

java.awt.AWTException / java.awt.AWTError
java.io.IOException / java.io.IOError

Until now, I didn't know these two errors existed, and they are not referenced from other classes in the Javadoc (1.6). So I don't know if and when they are thrown.