What calls main? Java calls main.

C:\>java myfile
... exceptions are output here.

You could write your own exception  handler if you wish. Lazy
programmers tend to throw everything.

It is always better to catch the error for your own benefit.

public foo() {
try {}
catch(Exception e)
{
e.printStackTrace();
}
}

It even tells you the line  number of the error! How cool is that?

well within the Main method  if the body throws  any exception  then that is
handled by this Throws clause..you can also provide a list of the expected
exceptions separated by commas just within the signature  of the Main...