Re: Initializing Variables

From:

Tom Anderson <twic@urchin.earth.li>

Newsgroups:

comp.lang.java.programmer

Date:

Wed, 26 May 2010 22:27:17 +0100

Message-ID:

<alpine.DEB.1.10.1005262226040.16996@urchin.earth.li>

On Wed, 26 May 2010, Tom Anderson wrote:

On Wed, 26 May 2010, Gunter Herrmann wrote:

Tom Anderson wrote:

On Tue, 25 May 2010, Arne Vajh?j wrote:

But I would note that in many cases the optimal solution is to
wait declaring the variable until you have a value to give it.

Absolutely. Goes without saying!

There are exceptions to this rule (pun intended)

Foo foo = null;

try {
foo = new Foo();
foo.doProcessing();
}
catch (FooException ex) {
doSomething(ex);
}
finally {
foo.cleanup();
}

In this case you have to initialize the variable foo.

No, because you should just write it like this:

Foo foo = new Foo();
try {
    foo.doProcessing();
}
catch (FooException ex) {
    doSomething(ex);
}
finally {
    foo.cleanup();
}

If new Foo() can also throw an exception, then wrap that whole lot in a
try-catch or whatever.

If the handling for FooExceptions from the constructor and the processing
is the same:

try {
Foo foo = new Foo();
try {
foo.doProcessing();
}
finally {
foo.cleanup();
}
}
catch (FooException ex) [
doSomething(ex);
}

tom

--
unconstrained by any considerations of humanity or decency