Errata

The unary minus operator '-' not only performs unary negation of the value of ist operand. It also performs a so-called unary numeric promotion is performed on the Operand.

The same holds for the unary plus operator. (Lang.Ref. § 15.15.3).

The code

char a = 'x', b = +a;

effects a compile-time error, since +a is of type int.

The text says:

Finally, two exception handling antipatterns that you should avoid:

<...example 1...>

// Never catch, log and rethrow an exception
try {
someMethodThatMightThrow();
} catch(SpecificException e){
log(e);
throw e;
}

<para>

The second one just creates noise - we're logging a message but not actually doing anything about the issue - we still requires some other code higher up in the system to actually deal with the problem.

===> But you don't actually suggest what the correct pattern is, from earlier in the book, what the programmer *should* do here is decorate the exception to add the "logging" information:


try {
someMethodThatMightThrow();
} catch(SpecificException e){
throw new OurException("Something we were logging", e);
}