RuntimeException can be thrown anything because that is an unchecked exception and Unchecked Exceptions need not be declared or caught
the difference between checked and unchecked exceptions:
Checked : Compiler checks whether the exceptions thrown are caught in the program somewhere or not
Unchecked: Compiler does not check the exceptions are caught somewhere or not, means they occur at runtime , like ArrayIndexOutOfBoundsException
SCJP 6 [86%] June 30th, 2010
OCPWCD [84%] March 26th, 2013
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Ioan Damian Sirbu
Joined: Dec 22, 2008
Thank you, I suspected it but I was not sure.
So basically, adding an unchecked exception in a method's declaration has absolutely no effect.