[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

Re: String interning (WAS: SAX2/Java: Towards a final form)

  • From: David Brownell <david-b@p...>
  • To: Miles Sabin <msabin@c...>
  • Date: Thu, 13 Jan 2000 12:35:51 -0800

java string
Miles Sabin wrote:
> David Brownell wrote,
> > Miles Sabin wrote,
> > > Except that String.intern() isn't the _only_ way of
> > > making foo.equals(bar) iff foo == bar (in particular
> > > contexts, as opposed to across the whole JVM).
> >
> > It's the only way to ensure it's so if foo is a string
> > literal, as is rather common usage.
> I don't follow. You're surely not suggesting that
>   foo == "literal".intern()
> is faster than,
>   foo.equals("literal")
> are you?

That's a conclusion you could draw.  I suppose that in some
cases a compiler might optimize

	String	foo = ...;
	boolean b = foo.equals ("literal");

so that the assignment to "b" doesn't invoke equals(), and
just uses "==", but not only would that be more aggressive
than I think most of them are, but then "equals" isn't going
to be invoked so the question is moot!

Literals are already interned.  It's in the language spec.
Look at the javadoc for java.lang.String.intern () ...

- Dave

xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i...
Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ or CD-ROM/ISBN 981-02-3594-1
Please note: New list subscriptions now closed in preparation for transfer to OASIS.


Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
First Name
Last Name
Subscribe in XML format
RSS 2.0
Atom 0.3

Stylus Studio has published XML-DEV in RSS and ATOM formats, enabling users to easily subcribe to the list from their preferred news reader application.

Stylus Studio Sponsored Links are added links designed to provide related and additional information to the visitors of this website. they were not included by the author in the initial post. To view the content without the Sponsor Links please click here.

Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.